<SEC-DOCUMENT>0001493152-20-012978.txt : 20200709
<SEC-HEADER>0001493152-20-012978.hdr.sgml : 20200709
<ACCEPTANCE-DATETIME>20200709170047
ACCESSION NUMBER:		0001493152-20-012978
CONFORMED SUBMISSION TYPE:	S-3
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20200709
DATE AS OF CHANGE:		20200709

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SIGMA LABS, INC.
		CENTRAL INDEX KEY:			0000788611
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS MANUFACTURING INDUSTRIES [3990]
		IRS NUMBER:				820404220
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-3
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-239774
		FILM NUMBER:		201021037

	BUSINESS ADDRESS:	
		STREET 1:		3900 PASEO DEL SOL
		CITY:			SANTE FE
		STATE:			NM
		ZIP:			87507
		BUSINESS PHONE:		(505) 438-2576

	MAIL ADDRESS:	
		STREET 1:		3900 PASEO DEL SOL
		CITY:			SANTE FE
		STATE:			NM
		ZIP:			87507

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FRAMEWAVES INC
		DATE OF NAME CHANGE:	20010130

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MESSIDOR LTD
		DATE OF NAME CHANGE:	20010122
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-3
<SEQUENCE>1
<FILENAME>forms-3.htm
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 65%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>As
    filed with the Securities and Exchange Commission on July 9, 2020</B></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 35%; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Registration
    No. 333- &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</B></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<!-- Field: Rule-Page --><DIV STYLE="width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 4pt solid; border-bottom: Black 1.5pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>UNITED
STATES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>SECURITIES
AND EXCHANGE COMMISSION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 12pt"><B>Washington,
D.C. 20549</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>FORM
S-3</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>REGISTRATION
STATEMENT</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>UNDER</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>THE
SECURITIES ACT OF 1933</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 18pt"><B>Sigma
Labs, Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Exact
name of registrant as specified in its charter)</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 49%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Nevada</B></FONT></TD>
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; width: 2%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 49%; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>27-1865814</B></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(State
        or other jurisdiction of</B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>incorporation
        or organization)</B></FONT></P></TD>
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(I.R.S.
        Employer</B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Identification
        No.)</B></FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
Labs, Inc.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3900
Paseo del Sol</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Santa
Fe, New Mexico 87507</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(505)
438-2576</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Address,
including zip code, and telephone number, including area code, of registrant&rsquo;s principal executive offices)</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Mark
K. Ruport</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Chief
Executive Officer</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
Labs, Inc.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3900
Paseo del Sol</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Santa
Fe, New Mexico 87507</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(505)
438-2576</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>(Name,
address, including zip code, and telephone number, including area code, of agent for service)</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><I>Copy
to:</I></B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Darren
T. Freedman</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TroyGould
PC</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">1801
Century Park East, 16th Floor</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Los
Angeles, California 90067</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>From
time to time after the effective date of this registration statement.<BR>
</B><I>(Approximate date of commencement of proposed sale to the public)</I></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please
check the following box. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under
the Securities Act of 1933 check the following box. [X]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please
check the following box and list the Securities Act registration statement number of the earlier effective registration statement
for the same offering. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list
the Securities Act registration statement number of the earlier effective registration statement for the same offering. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become
effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register
additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following
box. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Indicate
by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting
company or an emerging growth company. See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo;
&ldquo;smaller reporting company&rdquo; and &ldquo;emerging growth company&rdquo; in Rule 12b-2 of the Exchange Act. (Check one):</FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 7%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 53%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Large accelerated filer [&nbsp;&nbsp;]</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 40%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Accelerated filer [&nbsp;&nbsp;]</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Non-accelerated filer [&nbsp;&nbsp;]</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Smaller reporting company [X]</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Emerging growth company [&nbsp;&nbsp;]</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for
complying with any new or revised financial accounting standards provided to Section 7(a)(2)(B) of the Securities Act. [&nbsp;&nbsp;]</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CALCULATION
OF REGISTRATION FEE</B></FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="text-align: center; border-bottom: Black 1.5pt solid">Title of each class of securities to be registered</TD><TD STYLE="font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1.5pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Amount to be<BR>
 registered<SUP>(1)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1.5pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Proposed<BR>
 maximum<BR>
 offering price<BR>
 per share<SUP>(2)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1.5pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Proposed<BR>
 maximum<BR>
 aggregate<BR>
 offering<BR>
 price<SUP>(2)</SUP></B></FONT></TD><TD STYLE="padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD><TD STYLE="font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="font-weight: bold; text-align: center; border-bottom: Black 1.5pt solid">Amount of<BR> registration<BR>
 fee</TD><TD STYLE="padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 40%">Common Stock, $0.001 par value per share</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 11%; text-align: right">515,465</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 11%; text-align: right">2.70</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 11%; text-align: right">1,391,755</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 11%; text-align: right">180.64</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant to Rule
    416 under the Securities Act of 1933, the shares being registered on this registration statement include such indeterminate
    number of shares of common stock as may be issuable with respect to the shares being registered on this registration statement
    as a result of stock splits, stock dividends or similar transactions.</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Estimated
    solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act of 1933 based
    upon the average of the high and low sale prices of the common stock as reported on The NASDAQ Capital Market on July 8,
    2020.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The
Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until
the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become
effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration Statement shall
become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B></B></FONT></P>

<!-- Field: Rule-Page --><DIV STYLE="width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 1.5pt solid; border-bottom: Black 4pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>&nbsp;</B></FONT></P>


<!-- Field: Page; Sequence: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red"><B>THE
INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. THESE SECURITIES MAY NOT BE SOLD UNTIL THE REGISTRATION STATEMENT
FILED WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PRELIMINARY PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES
AND WE ARE NOT SOLICITING AN OFFER TO BUY THESE SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; color: Red">Subject
to completion, dated July 9, 2020</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SIGMA
LABS, INC.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Prospectus</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">515,465
Shares of Common Stock Offered by Selling Stockholders</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
prospectus relates to the offer and sale from time to time of up to 515,465 shares of our common stock issuable upon the exercise
of currently outstanding common stock purchase warrants (the &ldquo;Placement Warrants&rdquo;). The Placement Warrants were acquired
by investors in an April 2020 private placement described herein. The investors are referred to in this prospectus as the &ldquo;selling
stockholders.&rdquo;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">For
a list of the selling stockholders, please see &ldquo;Selling Stockholders.&rdquo; The selling stockholders may sell these shares
from time to time in the principal market on which our common stock is traded at the prevailing market price, in negotiated transactions,
or through any other means described in the section titled &ldquo;Plan of Distribution.&rdquo; We do not know when or in what
amount the selling stockholders may offer the securities for sale. The selling stockholders may sell some, all or none of the
securities offered by this prospectus. The selling stockholders may be deemed underwriters within the meaning of the Securities
Act of 1933, as amended, of the shares of common stock that they are offering. We will pay the expenses of registering these shares.
We will not receive proceeds from the sale of our shares by the selling stockholders that are covered by this prospectus. However,
we will receive payment of the exercise price upon any exercise of the Placement Warrants to the extent exercised on a cash basis,
and any such proceeds we receive will be used for general corporate purposes and for working capital.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
common stock is traded on The NASDAQ Capital Market under the symbol &ldquo;SGLB.&rdquo; On July 8, 2020, the last reported
sale price of our common stock as reported on The NASDAQ Capital Market was $2.71.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>You
should understand the risks associated with investing in our common stock. Before making an investment, read the &ldquo;Risk Factors,&rdquo;
which begin on page 8  of this prospectus.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>We
may amend or supplement this prospectus from time to time by filing amendments or supplements as required. You should read the
entire prospectus and any amendments or supplements carefully before you make your investment decision.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Neither
the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or
determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>This
prospectus is dated &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;, 2020.</B></FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 2; Options: NewSection; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: LowerRoman; Name: PageNo -->i<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><U>TABLE
OF CONTENTS</U></B></FONT></P>

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; border-bottom: black 1.5pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Page</B></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_001">ABOUT THIS PROSPECTUS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">1</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_002">PROSPECTUS SUMMARY</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 48px; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">2</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_003">THE OFFERING</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">7</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_004">RISK FACTORS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">8</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_005">CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">8</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_006">USE OF PROCEEDS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">8</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#a_007">SELLING STOCKHOLDERS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">9</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_001">PLAN OF DISTRIBUTION</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">13</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_002">DESCRIPTION OF SECURITIES</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">15</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_003">LEGAL MATTERS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">17</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_004">EXPERTS</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">18</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_005">WHERE YOU CAN FIND MORE INFORMATION</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">18</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: white">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; background-color: #CCEEFF">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="#o_006">INCORPORATION OF CERTAIN INFORMATION BY REFERENCE</A></FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">19</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 3; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: LowerRoman; Name: PageNo -->ii<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><P STYLE="margin: 0pt">&nbsp;</P></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_001"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>ABOUT
THIS PROSPECTUS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
prospectus is part of a registration statement that we filed on behalf of the selling stockholders with the Securities and Exchange
Commission, or the SEC, to permit the selling stockholders to sell the shares described in this prospectus in one or more transactions.
The selling stockholders and the plan of distribution of the shares being offered by them are described in this prospectus under
the headings &ldquo;Selling Stockholders&rdquo; and &ldquo;Plan of Distribution.&rdquo;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
permitted by the rules and regulations of the SEC, the registration statement filed by us includes additional information not
contained in this prospectus. You may read the registration statement and the other reports we file with the SEC at the SEC&rsquo;s
web site or its offices described below under the heading &ldquo;Where You Can Find More Information.&rdquo;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">You
should rely only on the information that is contained in this prospectus or that is incorporated by reference into this prospectus.
We and the selling stockholders have not authorized anyone to provide you with information that is in addition to or different
from that contained in, or incorporated by reference into, this prospectus. If anyone provides you with different or inconsistent
information, you should not rely on it.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
shares of common stock offered by this prospectus are not being offered in any jurisdiction where the offer or sale of such common
stock is not permitted. You should not assume that the information contained in, or incorporated by reference into, this prospectus
is accurate as of any date other than the date of this prospectus or, in the case of the documents incorporated by reference,
the date of such documents, regardless of the date of delivery of this prospectus or any sale of the common stock offered by this
prospectus. Our business, financial condition, liquidity, results of operations and prospects may have changed since those dates.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Unless
otherwise stated or the context otherwise requires, the terms &ldquo;Sigma,&rdquo; &ldquo;we,&rdquo; &ldquo;us,&rdquo; &ldquo;our&rdquo;
and the &ldquo;Company&rdquo; refer to Sigma Labs, Inc., a Nevada corporation.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 4; Options: NewSection; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->1<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_002"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>PROSPECTUS
SUMMARY</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>&nbsp;</I></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>The
following summary highlights selected information contained elsewhere in or incorporated by reference in this prospectus. This
summary is not complete and does not contain all of the information that should be considered before investing in our securities.
Potential investors should read the entire prospectus carefully, including the more detailed information regarding our business
provided in our Annual Report on Form 10-K for the fiscal year ended December 31, 2019 (the &ldquo;Form 10-K&rdquo;) incorporated
herein by reference, the risks related to our securities discussed under the &ldquo;Risk Factors&rdquo; section of the Form 10-K,
and our financial statements and the accompanying notes to the financial statements incorporated herein by reference.</I></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Our
Company</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Summary</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
is a 10-year-old software company that was founded by scientist-engineers composed of physicists and metallurgists then working
at Los Alamos National Labs for the entrepreneurial purpose of developing sophisticated metallurgical products. The public company
that in 2010 completed a share exchange transaction with the shareholders of a company that became Sigma Labs in 2010 was incorporated
as Messidor Limited in Nevada on December 23, 1985 and changed its name to Framewaves Inc. in 2001. On September 27, 2010, the
name was changed from Framewaves Inc. to Sigma Labs, Inc. Thenceforth, the Company developed both a dental implant technology
and a munitions technology before narrowing its focus exclusively in 2016 to solving the complex and challenging problem of how
to best assure the high quality of metal parts manufactured in laser powder bed additive manufacturing (AM) machines. Sigma and
many others, then and now, believed that until this problem was solved, 3D manufacturing of metal parts was not sufficiently scalable
to grow past prototyping and mature into a major industry enjoying high quality yields and cost-efficient production runs. The
solution that Sigma developed to solve this problem is In-Process-Quality-Assurance (&ldquo;IPQA&rdquo;) software known as PrintRite3D<SUP>&reg;</SUP>.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">From
2016 through 2020 the Company and its technology co-evolved in transformation that saw the Company step up from being a small
research and development operation to reinvent itself as a technology commercialization company in 2017 deploying its alpha technology
concept with Aerojet Rocketdyne, Pratt and Whitney, Siemens, Woodward, and other companies to work as a sometimes virtual integrated
team with these customers&rsquo; R&amp;D personnel and thus to acquire directly from major companies in the market the definition
of the specifications of what Sigma&rsquo;s product would have to be in order to meet commercial industrial standards. Defining
these standards included defining the specific product quality data information and analytics requirements of large production
manufacturers as well as determining the user-friendly form the product must have. In February 2017, Sigma completed a financing
and a simultaneous up list on to the NASDAQ Capital Market, the two actions intended to enable the Company to accelerate product
development and commercialization while also having ongoing access to capital. By mid-2018, Sigma had doubled its software development
team and in the course of the year developed and integrated its PrintRite3D<SUP>&reg;</SUP> Thermal Energy Density&trade; (TED)
and Thermal Energy Planck (TEP) algorithm analytical packages into a hardened commercial industrial product presented at Formnext
in November 2018. In 2019, the Company launched its Rapid Test and Evaluation Program (RTE) in order to deploy its new product
in a test and evaluation process explicitly designed: (1) to define the test outcome requirements of both end-users and Original
Equipment Manufacturers (OEM) required to meet their respective needs in a production setting; and, (2) to be a pathway that Sigma
believed would lead to sales of equipment to end-users or of licenses to OEMs subject to the tests and evaluations meeting the
upfront stated requirement of the companies with whom tests would be run. In the second Quarter of 2019, Sigma released version
5.0 of PrintRite3D<SUP>&reg;</SUP> with a user-friendly interface tool that enables process engineers to drill down into the data
and machine operators to better understand and control the process.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 5; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">By
year-end of 2019, the RTE results were consistently favorable and we experienced no product failures, however the time required
to complete an RTE was longer than expected due to operational issues within the test sites that were beyond our control. Baker
Hughes, for whom on-site testing began in April 2019, had ordered a Phase 2 as the final phase ahead of a potentially broader
global rollout of the technology to their additive manufacturing machine base. The major service provider, with whom our on-site
testing began in March 2019, had also begun its second RTE to start on a different OEM brand from the first RTE tests. Another
major OEM whose purchase order for an RTE we announced in August 2019 had only its own brand upon which to test and agreed to
complete two simultaneous test units on different models and was thus on a fast track. Airbus was developing on schedule and expected
to require a Phase 2 if and after the current RTE met their needs. Materialise, a diverse AM company and an OEM for AM control
systems and software, had been Sigma&rsquo;s first RTE program participant and with whom the Company announced in June 2019 that
Sigma had entered into a non-binding Memorandum of Understanding to integrate PrintRite3D<SUP>&reg;</SUP> with Materialise&rsquo;s
new MPC AM equipment control system. As stated in the &ldquo;Recent Events&rdquo; of this document, on March 5, 2020 the Company
announced that Sigma and Materialise have now entered a Joint Sales Agreement to commercialize the integrated product.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
defined and disclosed in 2019, Sigma&rsquo;s mission and challenge in 2020 and beyond is to convert the testing it conducted in
2019 into purchase orders and OEM licenses going forward. Of course, there is no assurance that this mission will be accomplished,
even as the goal and strategy are what would be the logical outcomes of successful product demonstrations. In order to further
strengthen itself to deliver on its mission to convert successful test and evaluation outcomes into end-user sales and OEM licenses,
the Company recruited and hired Mark K. Ruport as of December 3, 2019 to help lead the company forward as Executive Chair. As
reported in December, Mr. Ruport is a skilled sales and marketing chief executive who has built three substantial software enterprises.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Currently,
Sigma is focusing on four markets: (i) end-user for deployment of PrintRite3D<SUP>&reg;</SUP> in serial production; (2) OEMs for
purchases of licenses and generating fees and royalties thereafter; (3) additive manufacturing software venders for alliances
and licenses for co-sales; and (4) research foundations, standards organizations and universities, all in service of Sigma&rsquo;s
potential for setting the industry standard of measurement by providing data and analytics as a metrics-based quality standard
of metal quality for all 3D laser powderbed manufactured parts, notwithstanding the design, metal, or brand of equipment upon
which parts are manufactured.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Additive
Metal Manufacturing and the role and need for Sigma&rsquo;s technology:</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3D
laser powderbed manufacturing of metal parts is a technology that uses lasers to sculpt parts by welding powdered metals into
3-dimensional (3D) objects and, to date, the quality of these parts can vary from part to part in a single production run, as
well as from machine to machine in a production line. Traditional quality assurance methods relying on statistically based post-process
inspection methods so well proven by &ldquo;Subtractive Manufacturing&rdquo; cannot be used effectively to improve and assure
quality of parts manufactured using 3D metal printers. The aforementioned traditional quality assurance methods are based on a
manufacturing process that is the opposite of 3D Additive Manufacturing; Subtractive Manufacturing begins with quality-assured
already formed pieces of metal as a raw material (not powdered metal as is used as raw material in 3D) and machines it with equipment
such as lathes, milling machines, and CNC machines to subtract metal and thus form finished metal parts, or by casting molten
metal into molded parts usually to then be further machined. Since the metal used in Subtractive Manufacturing is already of proven
quality, the quality of the metal for all parts in a production run is known to be uniform, subject to post process inspection
of a statistically determined valid sample size focused primarily on metrology to determine dimensional accuracy rather than metallurgy
to determine metal quality.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
challenge presented of 3D Additive Manufacturing quality assurance is illustrated by the fact that if a 3D metal manufacturing
machine fabricates 10 parts, and quality inspectors then rigorously inspect three of them, the inspectors will have learned about
the quality of only the three parts they destroyed or CT-scanned and nothing that is sufficient to confirm or reject the quality
of the remaining seven. Quality assurance of 3D Additive metal parts requires high quality sensitive manufacturers to institute
procedures to inspect 100% of the parts being made. Sigma believes that the best, indeed, to Sigma&rsquo;s knowledge, the only
known way to attain high yields for both manufacturing quality and cost efficiency is an In-Process-Quality-Assurance (IPQA<SUP>&reg;</SUP>)
approach that examines each part in real time as it is being manufactured, determines in real time whether it meets quality specifications
and permits machine operators to act on the information if a part is beginning to deviate from its design specifications.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 6; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">As
evidenced in the marketplace in 2016 and after the pent-up demand of GE, Airbus and others to press forward into advanced 3D metal
manufacturing, production took place with the assumption that highly reliable in-process quality assurance capability would likely
emerge either from their own internal efforts or be attained through licensing, or acquisition. In the meantime, CT scans and
other costly post-process inspection became an accepted cost as initially sustainable in the startup phases of production. However,
until companies that utilize 3D production facilities like GE Aviation are able to effectively verify that each part conforms
to design specifications of attributes of shape, density, strength and consistency in real-time during the manufacturing process,
we believe that such companies will be at risk of letting some substandard parts through and, also, be unable to improve the workflow
to high quality cost-optimum yields of 3D printed metal parts. No matter how much acuity and at what cost a suite of <I>post </I>process
inspection tools might provide 3D manufactured metal parts, it currently can only assure quality yield by rejecting fully formed
parts, and, over time, applying comprehensive &lsquo;reverse engineering&rsquo; forensic analyses of each rejected part to identify
repeating quality flaws attributable to constants such as location, design, or scan strategy. Once the locations of these repeating
flaws are identified, process engineers can act to make the AM equipment deliver better quality by adjusting the computer-based
manufacturing instructions of AM equipment to offset the repeating flaws discovered by that deep analyses of individual rejected
parts in many manufacturing runs. This prolonged post-process methodology is very costly due to the loss of material and rejected
parts as well as post-process analysis labor cost and inspection cost such as CT scanning. Additionally, there still lingers the
question of whether or not the post-process inspections were sufficiently granular to assure that flawed parts were not accepted
and shipped.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
believe that our product, PrintRite3D<SUP>&reg;</SUP> version 5.2, which is &lsquo;agnostic&rsquo; and can be installed on all
major brands of 3D metal laser powderbed printers, solves these problems by determining if each part is being made to the metallurgical
quality specifications of the product design as each part is being made. Our software enables 3D prototyping to evolve forward
into serial or production 3D manufacturing by providing a software suite with algorithm-based tools that address and overcome
quality issues that are specific to 3D Metal Additive Manufacturing and that are not solved using the post-production quality
methods developed for subtractive manufacturing along with and newly dependent upon CT scanning. The PrintRite3D<SUP>&reg;</SUP>
suite has the potential to substantially lower operating costs and can attain higher yields by inspecting parts as they are made
and providing machines and their operators actionable information that includes the options of stopping manufacture of given part(s)
while operations continue to complete parts that are in specification, thus saving time and money while raising yields.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">PrintRite3D<SUP>&reg;
</SUP>also gives operators information from run-to-run that enables them to &lsquo;learn up&rsquo; quality for a given machine
by using PrintRite3D<SUP>&reg;</SUP> data about machine behaviors that can then be offset by making adjustments to power settings
directed at a given sector. PrintRite3D<SUP>&reg;</SUP>&rsquo;s (&ldquo;TED&rdquo;) feature supersedes and truncates the &ldquo;reverse
engineering&rdquo; process of post process inspection described above by providing process engineers the data required to optimize
individual machines as well as machines in series in days or weeks and before serial production is launched rather than months
after production and rejection rates have accrued in costly quantities. PrintRite3D<SUP>&reg;</SUP>&rsquo;s (&ldquo;TEP&rdquo;)
feature provides machine operators and engineers with in-process real-time identification of signatures of quality anomalies as
they begin to develop and permits terminating or curing a part in process and provides them with alerts that enable the operators
to use the anomalies&rsquo; signature information to know how to adjust the machine controls to cure the problem, or in rare instances,
to terminate the part if its cause is reversable.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The
emergence of the 3D Metal Printing Market and Sigma&rsquo;s place in it</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3D
printing (3DP) or additive manufacturing (AM) is challenging the manufacturing world with the breadth of its technological abilities
from rapid design through cost efficient manufacturing to produce complex and unique metal parts. 3D AM technology total industry
sales, including all raw materials used reached $1 billion in 2007, jumped to nearly $7.3 billion in 2017, and were expected by
Wohlers to hit $26.5 billion by 2021. Sectors of the industry have tended so far to grow in step functions as new methods, processes,
and materials have entered the market. Worldwide revenues attributable to 3D manufacturing for metal products were reported at
$88.1 million in 2015 (Wohlers Report 2016, 3D Printing and Additive Manufacturing State of the Industry &ndash; Annual Worldwide
Progress Report). By 2017, Wohlers Report stopped estimating annual 3D metal parts revenue, stating that too much of the revenue
is proprietary information and unavailable from aerospace and similar high-tech sectors. Powdered metal suppliers to the AM metal
industry surveyed by Wohlers for their growth forecasts for 2017 for the raw materials used in metal AM parts manufactured averaged
expectations of a 59% increase for 2017. According to Sigma&rsquo;s experience in costing and pricing the manufacturing of AM
metal parts, as confirmed by consultation with other service providers, the total powdered metal sales forecast for 2017 is enough
raw material to produce a &ldquo;retail value&rdquo; of the metal parts of ~$800 million in 2017. Wohler estimates that the fastest
growing sector of the total 3D market into the 2020s is and will be 3D metal printing at a CAGR averaging 30%.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 7; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
another vector, according to Wohlers, an estimated 1,768 metal AM machines were sold in 2017, an increase of 79% over 2016, and
the 2,297 AM Metal machines sold in 2018, an CAGR of 30% over 2017. As large established companies including Toshiba, HP, Lenovo,
Canon and Ricoh in the course of 2016-2017 announced products or intents of entry in AM manufacturing, Electro Optical Systems
(&ldquo;EOS&rdquo;), a well-established vendor of AM manufacturing equipment opened a new plant in January 2018 that, according
to EOS, doubled its 2017 capacity to 1,000 units per year. SLM Solutions AG also reportedly expanded into a new factory during
this period. In the same period, over $1 billion growth capital and consolidation capital was invested in the metal sector. General
Electric spent &gt;$1.4 Billion in 2016-2017 acquiring Arcam and Concept Laser thus securing a source of supply for itself as
well as a new OEM capital equipment business. In the same period GE also invested &gt;$100 Million in in Desktop Metal. In October
2018 General Electric announced that it had manufactured and shipped its 30,000th 3D manufactured fuel nozzle, while Airbus was
targeted to grow to taking delivery of up to ~30 tons of metal parts per month by December 2018. 3D metal printers are seeing
rapid adoption, with an installed base of 11,000 globally, with 2,297 sold in 2018 alone at an ASP of $413,000. Extending data
and trends reported by Wohlers above, Sigma&rsquo;s possible addressable market 2021-2027 is approximately $2 billion &ndash;
or a potential $100m revenue for every 5% of market share. The figures in this paragraph are extrapolations from Wohlers and SmarTech
data and forecasts of the total available market for Sigma products; the calculation that 5% of that total available market is
$100m is intended as metric to make the scale of market opportunity more understandable, and it is not a forecast. We believe
there is potential for our PrintRite3D<SUP>&reg;</SUP> software to be incorporated into a significant percentage of 3D metal printing
devices made by companies like Additive Industries, ARCAM, Concept Laser, DMG Mori, Electro-Optical Systems (&ldquo;EOS&rdquo;),
SLM, Trumpf Industries, Farsoon, Renishaw, Sodick, and others.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Third
Party Competition and Sigma&rsquo;s Intellectual Property Safeguards</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
is engaged with large companies in several industries including aerospace, defense, oil and gas, bio-medical, and power generation
because both we, and they, agree that they need a common quality standard and third party quality assurance tools for 3D metal
printing that applies to all laser powderbed-made parts regardless of which machine, design, or metal was employed. To date, we
are unaware of any meltpool monitoring products that compete with PrintRite3D that can meet those criteria. Sigma&rsquo;s thermal
data gathering, and analytical tools provide quality information metrics that correlate to measures of internal metal part design,
conformity, uniformity, and characteristics such as porosity, unsintered material etc. The primary competition to PrintRite 3D
is varying iterations of Optical Tomography (OT). Optical Tomography develops optical data and computer analysis thereof sometimes
linked to simulation tools to predict quality. OT technology does not provide universal thermal-data based metrics of metal quality
that Sigma&rsquo;s thermal data provides, and which are fundamental to confirming or rejecting parts based on measurable consistency
of material properties.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
began its investigation and research into optical and thermal data collection and measurement for quality assurance and intervention
approximately 5 years ago and began to develop its intellectual property protection at that time also. The international IP law
firm, Kilpatrick Townsend &amp; Stockton LLP, has advised the Company on building the nets and walls of its patent portfolio,
trade secrets, trademarks, etc. and filed and prosecuted patents as the Company has grown its body of intellectual property.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 8; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->5<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" ALIGN="CENTER" STYLE="font: 10pt Times New Roman, Times, Serif; border-collapse: collapse; width: 50%">
<TR STYLE="vertical-align: bottom">
    <TD COLSPAN="13" STYLE="border-bottom: Black 1.5pt solid; font-weight: bold; font-style: italic; text-align: center">Sigma Labs, Inc. Patent Portfolio</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="border-bottom: Black 1.5pt solid; font-weight: bold; text-align: center">Jurisdiction</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1.5pt solid; font-weight: bold; text-align: center">Granted</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1.5pt solid; font-weight: bold; text-align: center">In Process</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1.5pt solid; font-weight: bold; text-align: center">Total</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt; font-weight: bold">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 44%; text-align: center">US</TD><TD STYLE="text-align: center; width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD><TD STYLE="width: 14%; text-align: center">11</TD><TD STYLE="width: 1%; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD><TD STYLE="width: 16%; text-align: center">11</TD><TD STYLE="width: 1%; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD><TD STYLE="width: 14%; text-align: center">22</TD><TD STYLE="width: 1%; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: center">PCT</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">-</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">2</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">2</TD><TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: center">EP</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">-</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">4</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">4</TD><TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: center">Germany</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">-</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">4</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">4</TD><TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: center">China</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">-</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">1</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">1</TD><TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: center">Japan</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">-</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">1</TD><TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD><TD STYLE="text-align: center">1</TD><TD STYLE="text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: center; padding-bottom: 1.5pt">Korea</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">-</TD><TD STYLE="padding-bottom: 1.5pt; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">1</TD><TD STYLE="padding-bottom: 1.5pt; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; padding-bottom: 1.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 1.5pt solid; text-align: center">1</TD><TD STYLE="padding-bottom: 1.5pt; text-align: center">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="font-weight: bold; text-align: center; padding-bottom: 2.5pt">Total</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 2.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">11</TD><TD STYLE="padding-bottom: 2.5pt; font-weight: bold; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 2.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">24</TD><TD STYLE="padding-bottom: 2.5pt; font-weight: bold; text-align: center">&nbsp;</TD><TD STYLE="text-align: center; font-weight: bold; padding-bottom: 2.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">&nbsp;</TD><TD STYLE="border-bottom: Black 2.5pt double; font-weight: bold; text-align: center">35</TD><TD STYLE="padding-bottom: 2.5pt; font-weight: bold; text-align: center">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Based
upon the evidence of competitors&rsquo; product claims and features reviewed by Sigma to date, it appears to us that Sigma&rsquo;s
solution to the quality problems of 3D metal printing is a significantly different technological approach than that of our principal
known competition. It continues to appear to us that the intellectual property protection of PrintRite3D&rsquo;s acuity, meaningful
metrics of thermal data correlated to part quality, and usability of its software accord Sigma freedom to operate with its technology,
and may be a significant barrier to entry to competitors switching over to try to pursue the technology path traveled by Sigma.
Notwithstanding the foregoing, we do understand that technology development is fraught with cases of new approaches and new technologies
emerging and surpassing existing intellectual property protections that looked and were powerful until a form of competition materialized;
there is no assurance that such an event will not take place adversely for Sigma.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>January
2020 Offering</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
January 27, 2020, the Company entered into a Securities Purchase Agreement (the &ldquo;January SPA&rdquo;) with certain institutional
investors who are also the selling stockholders under this Prospectus. Pursuant to the January SPA, on January 28, 2020 the Company
issued and sold (the &ldquo;January Offering&rdquo;) 1,640 shares of the Company&rsquo;s Series D Convertible Preferred Stock
(the &ldquo;Series D Preferred Stock&rdquo;) under a certificate of designations (the &ldquo;Certificate of Designations&rdquo;),
warrants to purchase 779,600 shares of the Company&rsquo;s Common Stock (the &ldquo;January Warrants&rdquo;) and warrants to purchase
6,156 shares of the Series D Preferred Stock (the &ldquo;Preferred Warrants&rdquo;) for a total gross purchase price of $1,600,000.
To the date of this Prospectus, the investors have exercised Preferred Warrants to purchase 2,196 shares of the Series D Preferred
Stock in a cumulative gross amount of $2,141,100.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>April
2020 Offering</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">On
April 2, 2020, the Company entered into a securities purchase agreement (the &ldquo;April SPA&rdquo;) with certain institutional
investors, who are the selling stockholders under this Prospectus. Pursuant to the April SPA, on April 6, 2020 the Company issued
and sold to the investors (the &ldquo;April Offering&rdquo;) (a) 493,027 shares of Company&rsquo;s Common Stock and Pre-Funded
Warrants (the &ldquo;Pre-Funded Warrants&rdquo;) to purchase up to 22,438 shares of Company&rsquo;s Common Stock pursuant to the
Company&rsquo;s existing Registration Statement on Form S-3, and (b) Placement Warrants to purchase an aggregate of 515,465 shares
of the Company&rsquo;s Common Stock pursuant to a private placement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Placement
Warrants</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Each
Placement Warrant is exercisable on the six month and one day anniversary of the issuance date, expires five years from the date
of issuance and has an exercise price of $2.50 per share of our Common Stock. Each holder of the Placement Warrants will be prohibited,
subject to certain exceptions, from exercising Placement Warrants to the extent that immediately prior to or after giving effect
to such exercise, the holder, together with its affiliates and other attribution parties, would own more than 4.99% or 9.99% (which
percentage is elected at each holder&rsquo;s discretion prior to the issuance of the Placement Warrant) of the total number of
shares of our common stock then issued and outstanding, which percentage may be changed by the holder&rsquo;s elections to a higher
or lower percentage not in excess of 9.99% upon 61 days&rsquo; notice to the Company subject to the terms of the Placement Warrant.
The Placement Warrants prohibit us from entering into specified transactions involving a change of control, unless the successor
entity assumes all of our obligations under the Placement Warrants under a written agreement before the transaction is completed.
The Placement Warrants are also subject to redemption by the Company in cash upon a fundamental transaction at the Black-Scholes
value of Placement Warrants.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Corporate
Information</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
were incorporated as Messidor Limited in Nevada on December 23, 1985 and changed our name to Framewaves Inc. in 2001. On September
27, 2010, we changed our name from Framewaves Inc. to Sigma Labs, Inc. We commenced our current business operations in 2010.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
principal executive offices are located at 3900 Paseo del Sol, Santa Fe, New Mexico 87507, and our telephone number is (505) 438-2576.
Our website address is www.sigmalabsinc.com, although the information on our website is not deemed to be part of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 9; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->6<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_003"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>The
Offering</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common Stock offered by the
    selling stockholders</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">515,465
    shares(1)</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common Stock offered by us </FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">None</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common Stock outstanding </FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3,926,362 shares(2)</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Common Stock to be outstanding after the offering
    </FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4,441,827 shares(2)(3)</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Nasdaq Capital Market Symbol</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">SGLB</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Use of proceeds</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We will not receive
    any proceeds from the sale of the common stock offered hereby. However, we may receive up to a maximum of approximately $1,288,662.50
    of gross proceeds from the exercise of Placement Warrants (based on an exercise price of $2.50 per share) by selling stockholders
    to the extent they are exercised on a cash basis, which proceeds we expect to use for general corporate purposes and for working
    capital. No assurances can be given that all or any portion of the Placement Warrants will ever be exercised.</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Risk factors</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">An investment in
    our common stock involves significant risks. See &ldquo;Risk Factors&rdquo; beginning on page 8, below.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)
Consists of 515,465 shares of common stock issuable upon the exercise of outstanding Placement Warrants.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)
As of June 30, 2020, and does not include (i) a total of 2,324,622 shares of common stock issuable upon the exercise of outstanding
options (with exercise prices ranging from $2.28 to $130.00 per share) and warrants including the January Warrants and Placement
Warrants (with exercise prices ranging from $0.10 to $40.00), (iii) 2,147,277 shares of common stock issuable upon conversion
of the additional preferred shares issuable upon exercise of the Preferred Warrants; (iv) a total of 61,651 shares issuable upon
the conversion of all of the shares of the Company&rsquo;s Series E Convertible Preferred Stock (the &ldquo;Series E Preferred
Shares&rdquo;), based on a conversion price of $10.30, and (v) 22,438 issuable upon the exercise of the Pre-Funded Warrants.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)
Assumes the exercise of all of the Placement Warrants by the selling stockholders and the sale of shares issued upon such exercise.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 10; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->7<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_004"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>RISK
FACTORS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Investing
in our common stock involves certain risks. Before you decide whether to purchase any shares of our common stock, in addition
to the other information in this prospectus, you should carefully consider the risks described under the heading &ldquo;Risk Factors&rdquo;
in our most recent Annual Report on Form 10-K, which are incorporated by reference into this prospectus, as such risk factors
may be updated from time to time by our future filings with the SEC. If one or more of these risks materializes, our business,
financial condition and results of operations may be adversely affected. In that event, the value of our common stock could decline.
The risks that are described in this prospectus or in any document that is incorporated by reference into this prospectus are
not the only risks that we face. Additional risks not presently known to us or that we currently believe to be immaterial may
also adversely affect our business, financial condition and results of operations.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_005"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CAUTIONARY
NOTE REGARDING FORWARD-LOOKING STATEMENTS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Some
of the statements contained or incorporated by reference in this prospectus may include forward-looking statements that reflect
our current views with respect to our research and development activities, business strategy, business plan, financial performance
and other future events. These statements include forward-looking statements both with respect to us, specifically, and our industry
sector, in general. We make these statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform
Act of 1995. Statements that include the words &ldquo;expect,&rdquo; &ldquo;intend,&rdquo; &ldquo;plan,&rdquo; &ldquo;believe,&rdquo;
&ldquo;project,&rdquo; &ldquo;estimate,&rdquo; &ldquo;may,&rdquo; &ldquo;should,&rdquo; &ldquo;anticipate,&rdquo; &ldquo;will&rdquo;
and similar statements of a future or forward-looking nature identify forward-looking statements for purposes of the federal securities
laws or otherwise.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">All
forward-looking statements involve inherent risks and uncertainties, and there are or will be important factors that could cause
actual results to differ materially from those indicated in these statements. We believe that these factors include, but are not
limited to, those factors set forth in the &ldquo;Risk Factors&rdquo; section of this prospectus, all of which you should review
carefully. Please consider our forward-looking statements in light of those risks as you read this prospectus and the accompanying
prospectus. We undertake no obligation to publicly update or review any forward-looking statement, whether as a result of new
information, future developments or otherwise.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">If
one or more of these or other risks or uncertainties materializes, or if our underlying assumptions prove to be incorrect, actual
results may vary materially from what we anticipate. All subsequent written and oral forward-looking statements attributable to
us or to individuals acting on our behalf are expressly qualified in their entirety by this Note. Before purchasing any of our
securities, you should consider carefully all of the factors set forth or referred to in this prospectus that could cause actual
results to differ.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_006"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>USE
OF PROCEEDS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
will not receive any proceeds from the sale of the common stock by the selling stockholders pursuant to this prospectus. All proceeds
from the sale of the shares will be for the account of the selling stockholders. The selling stockholders may sell these shares
on The NASDAQ Capital Market or otherwise, at market prices prevailing at the time of sale, at prices related to the prevailing
market price, or at negotiated prices. However, we will receive proceeds upon the cash exercise of the Placement Warrants. If
all of the Placement Warrants are exercised at the initial exercise price of $2.50 per share (as to 515,465 shares), then we will
receive gross proceeds of approximately $1,288,662.50 to the extent the Warrants are exercised on a cash basis. Any such proceeds
will be used for working capital and general corporate purposes. No assurance can be given, however, that all or any portion of
such Warrants will be exercised for cash or otherwise.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 11; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->8<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholders will pay any underwriting discounts and commissions and expenses incurred by the selling stockholders for
brokerage or legal services or any other expenses incurred by the selling stockholders in disposing of the shares included in
this prospectus. We will bear all other costs, fees and expenses incurred in effecting the registration of the shares covered
by this prospectus, including all registration and filing fees and fees and expenses of our counsel and accountants.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><A NAME="a_007"></A><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SELLING
STOCKHOLDERS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Selling
Stockholders Table</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
shares of common stock being offered by the selling stockholders are those issuable to the selling stockholders upon exercise
of the Placement Warrants. We are registering the shares of common stock in order to permit the selling stockholders to offer
the shares for resale from time to time. Except for the ownership of our securities issued in the January Offering and April Offering,
the selling stockholders have not had any material relationship with us within the past three years.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">The table below lists
the selling stockholders and other information regarding the beneficial ownership (as determined under Section 13(d) of the Securities
Exchange Act of 1934, as amended, and the rules and regulations thereunder) of the shares of common stock held by each of the
selling stockholders. The second column lists the number of shares of common stock beneficially owned by the selling stockholders,
based on their respective ownership of shares of common stock and preferred shares, as of June 30, 2020, assuming conversion of
the Series D Preferred Stock (collectively, the &ldquo;Preferred Shares&rdquo;) and exercise of the January Warrants,
Placement Warrants and Pre-Funded Warrants held by each such selling stockholder on that date but taking account of any limitations
on conversion in the certificate of designations and limitations on exercise set forth in the Placement Warrants. The third column
lists the shares of common stock being offered by this prospectus by the selling stockholders and does not take in account any
limitations on exercise of the Placement Warrants set forth therein. The fourth column assumes the sale of all of the shares offered
by the selling stockholders pursuant to this prospectus.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
the terms of the Placement Warrants, a selling stockholder may not exercise the Placement Warrants, to the extent (but only to
the extent) such selling stockholder or any of its affiliates would beneficially own a number of shares of our common stock which
would exceed 4.99% of the outstanding shares of the Company. The selling stockholders may sell all, some or none of their shares
in this offering. See &ldquo;Plan of Distribution.&rdquo;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 12; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->9<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font-weight: bold; border-bottom: Black 1.5pt solid">Name of Selling Stockholder</TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: center; border-bottom: Black 1.5pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Number
of <BR>
Shares of<BR>
Common Stock<BR> Owned Prior to<BR> Offering (1)</B></FONT></P></TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: center; border-bottom: Black 1.5pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Maximum
<BR>
Number of<BR>
Shares<BR> of Common<BR>
Stock<BR> to be Sold <BR>
Pursuant to this<BR>
Prospectus</B></FONT></P></TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD>
    <TD COLSPAN="2" STYLE="text-align: center; border-bottom: Black 1.5pt solid"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Number
of <BR>
Shares of <BR>
Common Stock<BR> Owned<BR>
After Offering</B></FONT></P></TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 51%">Iroquois Master Fund Ltd.(2)</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">222,863</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 13%; text-align: right">72,165</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">&nbsp;</TD><TD STYLE="width: 12%; text-align: right">150,698</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">Iroquois Capital Investment Group LLC(3)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">265,217</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">185,567</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">79,650</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">Anson Investments Master Fund Ltd(4)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">241,985</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">171,822</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">70,163</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">Brio Capital Master Fund Ltd(5)</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right"><P STYLE="margin: 0; font: 10pt Times New Roman, Times, Serif">234,132</P></TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">85,911</TD><TD STYLE="text-align: left">&nbsp;</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">148,221</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under the terms
    of the January Warrants and Placement Warrants, the holders do not have the right to exercise the warrants to the extent that,
    after giving effect to such exercise, the holder (together with its affiliates) would beneficially own in excess of 4.99%
    (the &ldquo;Maximum Percentage&rdquo;) of the shares of our common stock outstanding immediately after giving effect to such
    exercise. Under the terms of the Series D Preferred Stock, the holders do not have the right to convert the Series D Convertible
    Preferred Stock to the extent that after giving effect to such conversion, the holder (together with its affiliates) would
    beneficially own in excess of the Maximum Percentage. The number of shares of common stock beneficially owned prior to the
    offering represents the maximum number of shares of common stock beneficially owned after giving effect to the Maximum Percentage.</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
        aggregate number of shares beneficially owned prior to the offering, without giving effect to the Maximum Percentage,
        assuming conversion of the Series D Preferred Stock at the June 30, 2020 Alternate Conversion Price of $2.27 and exercise
        of the January Warrants at the exercise price of $2.50 and the exercise of the Placement Warrants at the exercise price
        of $2.50 per share, respectively, and assuming the full exercise of the Preferred Warrants and the Pre-funded Warrants,
        would equal 539,827 shares of common stock as follows: (i) 109,800 shares of common stock issuable upon exercise of the
        January Warrants (ii) 340,528 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock (representing 340,528 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock issuable upon exercise of the Preferred Warrants), (iii) 72,165 shares of common stock issuable upon exercise of
        the Placement Warrants, (iv) 6,283 shares of common stock issuable upon exercise of the Pre-Funded Warrants, and (v) 11,051
        shares of common stock.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Iroquois
        Capital Management L.L.C. is the investment manager of Iroquois Master Fund, Ltd. Iroquois Capital Management, LLC has
        voting control and investment discretion over securities held by Iroquois Master Fund. As managing members of Iroquois
        Capital, Kimberly Page and Richard Abbe make voting and investment decisions on behalf of Iroquois Capital Management,
        LLC in its capacity as investment manager to Iroquois Master Fund Ltd. As a result of the foregoing, Ms. Page and Mr.
        Abbe may be deemed to have beneficial ownership (as determined under Section 13(d) of the Securities Exchange Act of 1934,
        as amended) of the securities held by Iroquois Capital Management and Iroquois Master Fund.</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 13; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->10<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
    <TD STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
        aggregate number of shares beneficially owned prior to the offering, without giving effect to the Maximum Percentage,
        assuming conversion of the Series D Preferred Stock at the June 30, 2020 Alternate Conversion Price of $2.27 and exercise
        of the January Warrants at the exercise price of $2.50 and the exercise of the Placement Warrants at the exercise price
        of $2.50 per share, respectively, and assuming the full exercise of the Preferred Warrants and the Pre-funded Warrants,
        would equal 1,388,613 shares of common stock as follows: (i) 284,800 shares of common stock issuable upon exercise of
        the January Warrants (ii) 840,474 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock representing 840,474 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock issuable upon exercise of the Preferred Warrants), (iii) 185,567 shares of common stock issuable upon exercise of
        the Placement Warrants, (iv) 16,155 shares of common stock issuable upon exercise of the Pre-Funded Warrants (v) 39,617
        shares of common stock, and (vi) 22,000 shares of common stock issuable upon exercise of the warrants issued in our February
        2017 financing.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Richard
        Abbe is the managing member of Iroquois Capital Investment Group LLC. Mr. Abbe has voting control and investment discretion
        over securities held by Iroquois Capital Investment Group LLC. As such, Mr. Abbe may be deemed to be the beneficial owner
        (as determined under Section 13(d) of the Securities Exchange Act of 1934, as amended) of the securities held by Iroquois
        Capital Investment Group LLC</FONT></P></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)</FONT></TD>
    <TD STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
        aggregate number of shares beneficially owned prior to the offering, without giving effect to the Maximum Percentage,
        assuming conversion of the Series D Preferred Stock at the June 30, 2020 Alternate Conversion Price of $2.27 and exercise
        of the January Warrants at the exercise price of $2.50 and the exercise of the Placement Warrants at the exercise price
        of $2.50 per share, respectively, and assuming the full exercise of the Preferred Warrants and the Pre-funded Warrants,
        would equal 923,039 shares of common stock as follows: (i) 263,200 shares of common stock issuable upon exercise of the
        January Warrants (ii) 488,017 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock representing 488,017 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock issuable upon exercise of the Preferred Warrants), and (iii) 171,822 shares of common stock issuable upon exercise
        of the Placement Warrants.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Anson
        Advisors Inc and Anson Funds Management LP, the Co-Investment Advisers of Anson Investments Master Fund LP (&ldquo;Anson&rdquo;),
        hold voting and dispositive power over the Common Shares held by Anson. Bruce Winson is the managing member of Anson Management
        GP LLC, which is the general partner of Anson Funds Management LP. Moez Kassam and Amin Nathoo are directors of Anson
        Advisors Inc. Mr. Winson, Mr. Kassam and Mr. Nathoo each disclaim beneficial ownership of these Common Shares except to
        the extent of their pecuniary interest therein. The principal business address of Anson is Walkers Corporate Limited,
        Cayman Corporate Centre, 27 Hospital Road, George Town, Grand Cayman KY1-9008, Cayman Islands.</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 14; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->11<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.25in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(5)</FONT></TD>
    <TD STYLE="text-align: justify; font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
        aggregate number of shares beneficially owned prior to the offering, without giving effect to the Maximum Percentage,
        assuming conversion of the Series D Preferred Stock at the June 30, 2020 Alternate Conversion Price of $2.27 and exercise
        of the January Warrants at the exercise price of $2.50 and the exercise of the Placement Warrants at the exercise price
        of $2.50 per share, respectively, and assuming the full exercise of the Preferred Warrants and the Pre-funded Warrants,
        would equal 685,968 shares of common stock as follows: (i) 121,800 shares of common stock issuable upon exercise of the
        January Warrants (ii) 478,257 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock representing 478,257 shares of common stock issuable upon conversion of shares of Series D Convertible Preferred
        Stock issuable upon exercise of the Preferred Warrants), and (iii) 85,911 shares of common stock issuable upon exercise
        of the Placement Warrants.</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Shaye
        Hirsch, as Director of Brio Capital Master Fund Ltd., has the power to vote and dispose of the shares held by Brio Capital
        Master Fund Ltd. and may be deemed to be the beneficial owner of these shares. The address for Brio Capital Master Fund
        Ltd. is c/o Brio Capital Management LLC, 100 Merrick Road, Suite 401W, Rockville Centre, New York 11570.</FONT></P></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
are registering the shares under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), to give the selling
stockholders the opportunity, if they so desire, to publicly sell the shares for their own accounts in such amounts and at such
times and prices as each may choose. The selling stockholders may from time to time offer and sell pursuant to this prospectus
any or all of the below listed shares of common stock owned by them. The registration of these shares does not require that any
of the shares be offered or sold by the selling stockholders. The selling stockholders may from time to time offer and sell all
or a portion of their shares in the over-the-counter market, in negotiated transactions, or otherwise, at prices then prevailing
or related to the then current market price or at negotiated prices.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
registered shares may be sold directly or through brokers or dealers, or in a distribution by one or more underwriters on a firm
commitment or best efforts basis. To the extent required, the names of any agent or broker-dealer and applicable commissions or
discounts and any other required information with respect to any particular offer will be set forth in a prospectus supplement.
Please see &ldquo;Plan of Distribution.&rdquo; The selling stockholders and any agents or broker-dealers that participate with
the selling stockholders in the distribution of registered shares may be deemed to be &ldquo;underwriters&rdquo; within the meaning
of the Securities Act, and any commissions received by them and any profit on the resale of the registered shares may be deemed
to be underwriting commissions or discounts under the Securities Act.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">No
estimate can be given as to the amount or percentage of common stock that will be held by the selling stockholders after any sales
made pursuant to this prospectus because the selling stockholders are not required to sell any of the shares being registered
under this prospectus. The following table assumes that the selling stockholders will sell all of the shares included in this
prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Transferees,
successors and donees of identified selling stockholders will not be able to use this prospectus for resales until they are named
in the table below by prospectus supplement or post-effective amendment. If required, we will add transferees, successors and
donees by prospectus supplement in instances where the transferee, successor or donee has acquired its shares from holders named
in this prospectus after the effective date of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 15; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->12<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Relationships
with Selling Stockholders</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Except
for our securities purchased in the January 2020 Offering and the April 2020 Offering, the selling stockholders are investors
who have had no position, office, or other material relationship (other than as purchasers of securities) with us or any of our
affiliates within the past three years.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
information in the above table is as of the date of this prospectus. Information concerning the selling stockholders may change
from time to time and any such changed information will be described in supplements to this prospectus if and when necessary.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_001"></A>PLAN
OF DISTRIBUTION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
are registering the shares of common stock issuable upon exercise of the Placement Warrants to permit the resale of these shares
of common stock by the holders thereof, from time to time after the date of this prospectus. We will receive proceeds from the
cash exercise of any Placement Warrants. We will not receive any of the proceeds from the sale by the selling
stockholders of the shares of common stock. We will bear all fees and expenses incident to our obligation to register the shares
of common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholders may sell all or a portion of the shares of common stock held by them and offered hereby from time to time
directly or through one or more underwriters, broker-dealers or agents. If the shares of common stock are sold through underwriters
or broker-dealers, the selling stockholders will be responsible for underwriting discounts or commissions or agent&rsquo;s commissions.
The shares of common stock may be sold in one or more transactions at fixed prices, at prevailing market prices at the time of
the sale, at varying prices determined at the time of sale or at negotiated prices. These sales may be effected in transactions,
which may involve crosses or block transactions, pursuant to one or more of the following methods:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 1in; text-indent: -0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">through
    the writing or settlement of options, whether such options are listed on an options exchange or otherwise;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">ordinary
    brokerage transactions and transactions in which the broker-dealer solicits purchasers;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">block
    trades in which the broker-dealer will attempt to sell the shares as agent but may position and resell a portion of the block
    as principal to facilitate the transaction;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">purchases
    by a broker-dealer as principal and resale by the broker-dealer for its account;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">an
    exchange distribution in accordance with the rules of the applicable exchange;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">privately
    negotiated transactions;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">short
    sales made after the date the Registration Statement is declared effective by the SEC;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">broker-dealers
    may agree with a selling security holder to sell a specified number of such shares at a stipulated price per share;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">a
    combination of any such methods of sale; and</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">any
    other method permitted pursuant to applicable law.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 16; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->13<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholders may also sell shares of common stock under Rule 144 promulgated under the Securities Act of 1933, as amended,
if available, rather than under this prospectus. In addition, the selling stockholders may transfer the shares of common stock
by other means not described in this prospectus. If the selling stockholders effect such transactions by selling shares of common
stock to or through underwriters, broker-dealers or agents, such underwriters, broker-dealers or agents may receive commissions
in the form of discounts, concessions or commissions from the selling stockholders or commissions from purchasers of the shares
of common stock for whom they may act as agent or to whom they may sell as principal (which discounts, concessions or commissions
as to particular underwriters, broker-dealers or agents may be in excess of those customary in the types of transactions involved).
In connection with sales of the shares of common stock or otherwise, the selling stockholders may enter into hedging transactions
with broker-dealers, which may in turn engage in short sales of the shares of common stock in the course of hedging in positions
they assume. The selling stockholders may also sell shares of common stock short and deliver shares of common stock,
as applicable, covered by this prospectus to close out short positions and to return borrowed shares in connection with such short
sales. The selling stockholders may also loan or pledge shares of common stock to broker-dealers that in turn may sell such shares.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholders may pledge or grant a security interest in some or all of the preferred stock, preferred warrants, or shares
of common stock owned by them and, if they default in the performance of their secured obligations, the pledgees or secured parties
may offer and sell the shares of common stock from time to time pursuant to this prospectus or any amendment to this prospectus
under Rule 424(b)(3) or other applicable provision of the Securities Act amending, if necessary, the list of selling stockholders
to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus. The selling
stockholders also may transfer and donate the shares of common stock in other circumstances in which case the transferees, donees,
pledgees or other successors in interest will be the selling beneficial owners for purposes of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">To
the extent required by the Securities Act and the rules and regulations thereunder, the selling stockholders and any broker-dealer
participating in the distribution of the shares of common stock may be deemed to be &ldquo;underwriters&rdquo; within the meaning
of the Securities Act, and any commission paid, or any discounts or concessions allowed to, any such broker-dealer may be deemed
to be underwriting commissions or discounts under the Securities Act. At the time a particular offering of the shares of common
stock is made, a prospectus supplement, if required, will be distributed, which will set forth the aggregate amount of shares
of common stock being offered and the terms of the offering, including the name or names of any broker-dealers or agents, any
discounts, commissions and other terms constituting compensation from the selling stockholders and any discounts, commissions
or concessions allowed or re-allowed or paid to broker-dealers.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
the securities laws of some states, the shares of common stock may be sold in such states only through registered or licensed
brokers or dealers. In addition, in some states the shares of preferred stock and common stock may not be sold unless such shares
have been registered or qualified for sale in such state or an exemption from registration or qualification is available and is
complied with.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">There
can be no assurance that any selling stockholder will sell any or all of the shares of common stock registered pursuant to the
registration statement, of which this prospectus forms a part.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
selling stockholders and any other person participating in such distribution will be subject to applicable provisions of the Securities
Exchange Act of 1934, as amended, and the rules and regulations thereunder, including, without limitation, to the extent applicable,
Regulation M of the Exchange Act, which may limit the timing of purchases and sales of any of the shares of preferred stock or
common stock by the selling stockholders and any other participating person. To the extent applicable, Regulation M may also restrict
the ability of any person engaged in the distribution of the shares of common stock to engage in market-making activities with
respect to the shares of common stock. All of the foregoing may affect the marketability of the shares of common stock and the
ability of any person or entity to engage in market-making activities with respect to the shares of common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 17; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->14<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
will pay all expenses of the registration of the shares of preferred stock and common stock pursuant to the registration rights
agreement, estimated to be $26,179.98 in total, including, without limitation, Securities and Exchange Commission filing fees
and expenses of compliance with state securities or &ldquo;blue sky&rdquo; laws; provided, however, a selling stockholder will
pay all underwriting discounts and selling commissions, if any. We will indemnify the selling stockholders against liabilities,
including some liabilities under the Securities Act in accordance with the registration rights agreements or the selling stockholders
will be entitled to contribution. We may be indemnified by the selling stockholders against civil liabilities, including liabilities
under the Securities Act that may arise from any written information furnished to us by the selling stockholder specifically for
use in this prospectus, in accordance with the related registration rights agreements or we may be entitled to contribution.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Once
sold under the registration statement, of which this prospectus forms a part, the shares of common stock will be freely tradable
in the hands of persons other than our affiliates.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_002"></A>DESCRIPTION
OF SECURITIES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0; margin-right: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Authorized
Capital Stock</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
are presently authorized to issue 12,000,000 shares of common stock, $0.001 par value per share, of which 3,926,362 shares were
outstanding as of June 30, 2020. We are presently authorized to issue 10,000,000 shares of $0.001 par value preferred stock, of
which 1,610,000 shares have been designated &ldquo;Series A Preferred Stock,&rdquo; 1,000 shares have been designated &ldquo;Series
B Convertible Preferred Stock,&rdquo; 1,500 shares have been designated &ldquo;Series C Convertible Preferred Stock,&rdquo; 7,796
shares have been designated as &ldquo;Series D Convertible Stock&rdquo; and 500 shares have been designated as &ldquo;Series E
Convertible Stock.&rdquo; As of the date hereof, we had no shares of Series A Preferred Stock, Series B Convertible Preferred
Stock, Series C Convertible Stock and Series D Convertible Preferred Stock issued and outstanding, and 333.33 shares of Series
E Convertible Preferred Stock is issued and outstanding.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Common
Stock</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
have one class of common stock. Holders of our common stock are entitled to one vote per share on all matters to be voted upon
by stockholders and do not have cumulative voting rights in the election of directors. Holders of shares of common stock are entitled
to receive on a pro rata basis such dividends, if any, as may be declared from time to time by our board of directors in its discretion
from funds legally available for that use, subject to any preferential dividend rights of outstanding preferred stock. They are
also entitled to share on a pro rata basis in any distribution to our common stockholders upon our liquidation, dissolution or
winding up, subject to the prior rights of any outstanding preferred stock. Common stockholders do not have preemptive rights
to subscribe to any additional stock issuances by us, and they do not have the right to require the redemption of their shares
or the conversion of their shares into any other class of our stock. The rights, preferences and privileges of holders of common
stock are subject to, and may be adversely affected by, the rights of the holders of any series of preferred stock that we may
designate and issue in the future.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Preferred
Stock</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
our articles of incorporation, our board of directors has the authority, without further action by stockholders, to designate
one or more series of preferred stock and to fix the voting powers, designations, preferences, limitations, restrictions and relative
rights granted to or imposed upon the preferred stock, including dividend rights, conversion rights, voting rights, rights and
terms of redemption, liquidation preference and sinking fund terms, any or all of which may be preferential to or greater than
the rights of the common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
board of directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect
the voting power or other rights of the holders of the common stock. The issuance of preferred stock, while providing flexibility
in connection with possible acquisitions and other corporate purposes, could, among other things, have the effect of delaying,
deferring or preventing a change in our control and may adversely affect the market price of the common stock and the voting and
other rights of the holders of common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 18; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->15<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">In
connection with our underwritten public offering of equity securities on February 21, 2017, we created a series of Preferred Stock
called &ldquo;Series A Preferred Stock.&rdquo; None of such shares were issued in such offering. In our April 6, 2018 private
placement, we issued 1,000 shares of Series B Preferred Stock (&ldquo;Series B Preferred&rdquo;), which were convertible into
100,000 shares of common stock. All shares of our Series B Preferred have been converted and 50,000 shares of common stock issued
upon conversion of such shares are currently beneficially owned by an affiliate of a selling stockholder. In our June 26, 2018
public offering of equity securities, we issued 350 shares of Series C Preferred Stock which were initially convertible into 35,000
shares of common stock. Accordingly, as of the date of this prospectus, all shares of such preferred stock have been fully converted.
In connection with the private placements occurring on January 27, 2020, we created two new series of Preferred Stock: the Series
D Preferred Stock and the Series E Preferred Stock. As of the date hereof, no shares of Series D Preferred Stock and 333.33 shares
of Series E Preferred Stock are issued and outstanding.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
the Certificate of Designations for the Series D Preferred Stock, the Series D Preferred Stock has an initial stated value of
$1,000 per share (the &ldquo;Stated Value&rdquo;). Dividends accrue at a dividend rate of 9% per annum (subject to increase upon
the occurrence (and during the continuance) of certain triggering events described therein) will accrue and, on a monthly basis,
shall be payable in kind by the increase of the Stated Value of the Series D Preferred Shares by said amount. The holders of the
Series D Preferred Shares will have the right at any time to convert all or a portion of the Series D Preferred Shares (including,
without limitation, accrued and unpaid dividends and make-whole dividends through the third anniversary of the closing date) into
shares of the Company&rsquo;s Common Stock at the conversion price then in effect, which is $2.50 (subject to adjustment for stock
splits, dividends, recapitalizations and similar events and full ratchet price protection). In addition, a holder may at any time,
alternatively, convert all, or any part, of its Series D Preferred Shares at an alternative conversion price, which equals the
lower of the applicable conversion price then in effect, and the greater of (x) $1.80 and (y) 85% of the average volume weighted
average price (&ldquo;VWAP&rdquo;) of the Common Stock for a five (5) trading day period prior to such conversion. Upon the occurrence
of certain triggering events, described in the Certificate of Designations, including, but not limited to payment defaults, breaches
of transaction documents, failure to maintain listing on the Nasdaq Capital Market, and other defaults set forth therein, the
Series D Preferred Shares would become subject to redemption, at the option of a holder, at a 125% premium to the underlying value
of the Series D Preferred Shares being redeemed.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Under
the Certificate of Designations for the Series E Preferred Stock, the Series E Preferred Shares have an initial stated value of
$1,500 per share (the &ldquo;Stated Value&rdquo;). Dividends at the initial rate of 9% per annum will accrue and, on a monthly
basis, shall be payable in kind by the increase of the Stated Value of the Series E Preferred Stock by said amount. The holders
of the Series E Preferred Shares have the right at any time to convert all or a portion of the Preferred Shares (including, without
limitation, accrued and unpaid dividends and make-whole dividends through the third anniversary of the closing date) into shares
of the Company&rsquo;s Common Stock at an initial conversion rate determined by dividing the Conversion Amount by the Conversion
Price ($1.30 above the consolidated closing bid price for the trading day prior to the execution of the Securities Purchase Agreement,
dated January 27, 2020, between and the purchasers referenced therein). The Conversion Amount is the sum of the Stated Value of
the Series E Preferred Shares then being converted plus any other unpaid amounts payable with respect to the Series E Preferred
Shares being converted plus the &ldquo;Make Whole Amount&rdquo; (the amount of any dividends that, but for the conversion, would
have accrued at the dividend rate for the period through the third anniversary of the initial issuance date). The Conversion Rate
is also subject to adjustment for stock splits, dividends recapitalizations and similar events.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Transfer
Agent</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
transfer agent and registrar of our common stock is Issuer Direct Corporation. The address of our transfer agent and registrar
is 1981 Murray Holladay Road, Suite 100 Salt Lake City, Utah 84117, and its telephone number is (801) 272-9294.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 19; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->16<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>Anti-Takeover
Effects of Certain Provisions of Our Charter Documents</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Our
articles of incorporation and bylaws contain provisions that could delay or prevent changes in control or changes in our management
without the consent of our board of directors. These provisions include the following:</FONT></P>


<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">a
    classified board of directors with three-year staggered terms, which may delay the ability of stockholders to change the membership
    of a majority of our board of directors; </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">no
    cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the
    exclusive right of our board of directors to elect a director to fill a vacancy created by the expansion of the board of directors
    or the resignation, death or removal of a director, which prevents stockholders from being able to fill vacancies on our board
    of directors; </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the
    ability of our board of directors to authorize the issuance of additional shares of preferred stock and to determine the terms
    of those shares, including preferences and voting rights, without stockholder approval, which could adversely affect the rights
    of our common stockholders or be used to deter a possible acquisition of our company;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the
    ability of our board of directors to alter our bylaws without obtaining stockholder approval; </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the
    required approval of the holders of at least two-thirds of the shares entitled to vote at an election of directors to adopt,
    amend or repeal our bylaws or repeal the provisions of our articles of incorporation and bylaws regarding the election and
    removal of directors; </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">a
    prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special
    meeting of our stockholders; </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the
    requirement that a special meeting of stockholders may be called only by the chairman of the board of directors, the chief
    executive officer, the president or the board of directors, which may delay the ability of our stockholders to force consideration
    of a proposal or to take action, including the removal of directors; and </FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">advance
    notice procedures that stockholders must comply with in order to nominate candidates to our board of directors or to propose
    matters to be acted upon at a stockholders&rsquo; meeting, which may discourage or deter a potential acquirer from conducting
    a solicitation of proxies to elect the acquirer&rsquo;s own slate of directors or otherwise attempting to obtain control of
    us.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">These
provisions could inhibit or prevent possible transactions that some stockholders may consider attractive.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>NASDAQ
Capital Market</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
Common Stock and the warrants issued in our February 2017 financing are currently traded on the NASDAQ Capital Market under the
symbols &ldquo;SGLB&rdquo; and &ldquo;SGLBW&rdquo; respectively.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Nevada
Anti-Takeover Law and Charter and Bylaws Provisions</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">NRS
sections 78.378 to 78.3793 provide state regulation over the acquisition of controlling interest in certain Nevada corporations
unless the articles of incorporation or bylaws of the corporation provide that the provisions of these sections do not apply.
This statute currently does not apply to our company because in order to be applicable, we would need to have a specified number
of Nevada residents as shareholders, and we would have to do business in Nevada directly or through an affiliate.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_003"></A>LEGAL
MATTERS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
validity of the common stock offered hereby has been passed upon for us by TroyGould PC, Los Angeles, California. Certain attorneys
employed by TroyGould PC beneficially own shares of our common stock constituting in the aggregate less than 1% of our outstanding
shares of common stock.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>


<!-- Field: Page; Sequence: 20; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->17<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_004"></A>EXPERTS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
financial statements of Sigma Labs, Inc. as of December 31, 2019 and December 31, 2018, included in the Annual Report on Form
10-K for the year ended December 31, 2019 have been audited by Haynie &amp; Company, an independent registered public accounting
firm, as stated in its report, which is incorporated herein by reference. We have incorporated these financial statements by reference
in reliance upon the report of Haynie &amp; Company, given upon their authority as experts in accounting and auditing.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_005"></A>WHERE
YOU CAN FIND MORE INFORMATION</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
have filed with the SEC a registration statement on Form S-3 with respect to this offering of our common stock. This prospectus,
which constitutes a part of the registration statement, does not contain all of the information set forth in the registration
statement, some items of which are contained in exhibits to the registration statement as permitted by the rules and regulations
of the SEC. Statements contained in this prospectus as to the contents of any contract, agreement or other document are summaries
of the material terms of that contract, agreement or other document. With respect to each of these contracts, agreements or other
documents filed or incorporated by reference as an exhibit to the registration statement, reference is made to the exhibits for
a more complete description of the matter involved. The SEC maintains a website that contains reports, proxy and information statements
and other information regarding registrants that file electronically with the SEC. The address of the SEC&rsquo;s website is http://www.sec.gov.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
file periodic reports and other information with the SEC. Such periodic reports and other information are available for inspection
at the website of the SEC referred to above. We maintain a website at http://www.sigmalabsinc.com. You may access our annual reports
on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished
pursuant to Section 13(a) or 15(d) of the Exchange Act with the SEC free of charge at our website as soon as reasonably practicable
after such material is electronically filed with, or furnished to, the SEC. The information contained on, or that may be obtained
from, our website is not, and shall not be deemed to be, a part of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 21; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->18<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="o_006"></A>INCORPORATION
OF CERTAIN INFORMATION BY REFERENCE</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-right: 0; margin-bottom: 0; text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
SEC allows us to &ldquo;incorporate by reference&rdquo; information from other documents that we file with it, which means that
we can disclose important information to you by referring you to those documents. The information incorporated by reference is
considered to be part of this prospectus. Information in this prospectus supersedes information incorporated by reference that
we filed with the SEC prior to the date of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
incorporate by reference into this prospectus and the registration statement of which this prospectus is a part the information
or documents listed below that we have filed with the SEC:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220004617/form10-k.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">our annual report on Form 10-K for the fiscal year ended December 31, 2019 filed with the SEC on March 24, 2020;</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220008743/form10-q.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">our quarterly report on Form 10-Q for the quarterly period ended March 31, 2020 filed with the SEC on May 14, 2020;</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">our
    Current Reports on Form 8-K filed with the SEC on <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220000519/form8-k.htm" STYLE="-sec-extract: exhibit">January
    13, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220000878/form8-k.htm" STYLE="-sec-extract: exhibit">January
    21, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001134/form8-k.htm" STYLE="-sec-extract: exhibit">January
    27, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/form8k.htm" STYLE="-sec-extract: exhibit">January
    30, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001582/form8-k.htm" STYLE="-sec-extract: exhibit">February
    4, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220002930/form8-k.htm" STYLE="-sec-extract: exhibit">February
    25, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220003119/form8-k.htm" STYLE="-sec-extract: exhibit">February
    28, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220004679/form8-k.htm" STYLE="-sec-extract: exhibit">March
    25, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005697/form8-k.htm" STYLE="-sec-extract: exhibit">April
    2, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005763/form8-k.htm" STYLE="-sec-extract: exhibit">April
    3, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005995/form8-k.htm" STYLE="-sec-extract: exhibit">April
    7, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220006751/form8-k.htm" STYLE="-sec-extract: exhibit">April
    20, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220007601/form8-k.htm" STYLE="-sec-extract: exhibit">May
    4, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220008744/form8-k.htm" STYLE="-sec-extract: exhibit">May
    14, 2020</A>, <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220011520/form8-k.htm" STYLE="-sec-extract: exhibit">June
    19, 2020</A>, and <A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220012176/form8-k.htm" STYLE="-sec-extract: exhibit">June
    29, 2020</A>; and</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9679;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000107878217000179/form8a021017_8a12b.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">the description of our Common Stock contained in our Registration Statement on Form 8-A (File No. 001-38015) filed with the SEC on February 14, 2017, including any amendment or reports filed for the purpose of updating such description.</FONT></A></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
also incorporate by reference any future filings (other than current reports furnished under Item 2.02 or Item 7.01 of Form 8-K
and exhibits filed on such form that are related to such items unless such Form 8-K expressly provides to the contrary) made with
the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act, including those made on or after the date of the initial
filing of the registration statement of which this prospectus is a part and prior to effectiveness of such registration statement,
until we file a post-effective amendment that indicates the termination of the offering of the securities made by this prospectus
and will become a part of this prospectus from the date that such documents are filed with the SEC. Information in such future
filings updates and supplements the information provided in this prospectus. Any statements in any such future filings will automatically
be deemed to modify and supersede any information in any document we previously filed with the SEC that is incorporated or deemed
to be incorporated herein by reference to the extent that statements in the later filed document modify or replace such earlier
statements.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
will furnish without charge to you, on written or oral request, a copy of any or all of the documents incorporated by reference,
including exhibits to these documents. You should direct any requests for documents to Sigma Labs, Inc., 3900 Paseo del Sol, Santa
Fe, New Mexico 87507; Telephone (505) 438-2576. Copies of the above reports may also be accessed from our website at http://www.sigmalabsinc.com.
We have authorized no one to provide you with any information that differs from that contained in this prospectus. Accordingly,
you should not rely on any information that is not contained in this prospectus. You should not assume that the information in
this prospectus is accurate as of any date other than the date of the front cover of this prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Any
statement contained in a document incorporated or deemed to be incorporated by reference in this prospectus will be deemed modified,
superseded or replaced for purposes of this prospectus to the extent that a statement contained in this prospectus modifies, supersedes
or replaces such statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 22; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%"><!-- Field: Sequence; Type: Arabic; Name: PageNo -->19<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Sigma
Labs, Inc.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Prospectus</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>515,465
Shares of Common Stock Offered by the Selling Stockholders</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;,
</B></FONT><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>2020</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: left"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>&nbsp;</B></FONT></P>


<!-- Field: Page; Sequence: 23 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>PART
II</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>INFORMATION
NOT REQUIRED IN PROSPECTUS</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
14. Other Expenses of Issuance and Distribution.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Set
forth below is an estimate (except for registration fee, which is actual) of the approximate amount of the fees and expenses payable
by us in connection with the issuance and distribution of the shares of our common stock described in this registration statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLPADDING="0" CELLSPACING="0" ALIGN="CENTER" STYLE="border-collapse: collapse; width: 60%; font: 10pt Times New Roman, Times, Serif">
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="width: 82%; text-align: left">SEC registration fee</TD><TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 1%; text-align: left">$</TD><TD STYLE="width: 14%; text-align: right">180.64</TD><TD STYLE="width: 1%; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">Accounting fee and expenses</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">5,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">Legal fees and expenses</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">15,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="text-align: left">Printing and related expenses</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">2,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="text-align: left">Transfer agent and registrar fees</TD><TD>&nbsp;</TD>
    <TD STYLE="text-align: left">&nbsp;</TD><TD STYLE="text-align: right">1,000.00</TD><TD STYLE="text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: White">
    <TD STYLE="padding-bottom: 1.5pt; text-align: left">Miscellaneous expenses</TD><TD STYLE="padding-bottom: 1.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; text-align: left">&nbsp;</TD><TD STYLE="border-bottom: Black 1.5pt solid; text-align: right">3,000.00</TD><TD STYLE="padding-bottom: 1.5pt; text-align: left">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom; background-color: rgb(204,238,255)">
    <TD STYLE="padding-bottom: 2.5pt">Total</TD><TD STYLE="padding-bottom: 2.5pt">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2.5pt double; text-align: left">$</TD><TD STYLE="border-bottom: Black 2.5pt double; text-align: right">26,180.64</TD><TD STYLE="padding-bottom: 2.5pt; text-align: left">&nbsp;</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
15. Indemnification of Directors and Officers.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to our amended and restated articles of incorporation, none of our directors or officers will have any personal liability to us
or our stockholders for damages for breach of fiduciary duty as a director or officer, except for damages for breach of fiduciary
duty resulting from (1) acts or omissions which involve intentional misconduct, fraud or a knowing violation of law or (2) the
payment of dividends in violation of the applicable statutes of Nevada.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Section
78.7502 of the Nevada Revised Statutes permits a corporation to indemnify a present or former director, officer, employee or agent
of the corporation, or of another entity or enterprise for which such person is or was serving in such capacity at the request
of the corporation, who was or is a party or is threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, except an action by or in the right of the corporation, against expenses, including attorneys&rsquo; fees,
judgments, fines and amounts paid in settlement actually and reasonably incurred in connection therewith, arising by reason of
such person&rsquo;s service in such capacity if such person (1) is not liable pursuant to Section 78.138 of the Nevada Revised
Statutes, which sets forth standards for the conduct of directors and officers, or (2) acted in good faith and in a manner which
he or she reasonably believed to be in or not opposed to the best interests of the corporation and, with respect to a criminal
action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. In the case of actions brought by or
in the right of the corporation, however, no indemnification may be made for any claim, issue or matter as to which such person
has been adjudged by a court of competent jurisdiction, after exhaustion of all appeals therefrom, to be liable to the corporation
or for amounts paid in settlement to the corporation, unless and only to the extent that the court in which the action or suit
was brought or other court of competent jurisdiction determines upon application that in view of all the circumstances of the
case, such person is fairly and reasonably entitled to indemnity for such expenses as the court deems proper.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Section
78.751 of the Nevada Revised Statutes permits any discretionary indemnification under Section 78.7502 of the Nevada Revised Statutes,
unless ordered by a court or advanced to a director or officer by the corporation in accordance with the Nevada Revised Statutes,
to be made by a corporation only as authorized in each specific case upon a determination that indemnification of the director,
officer, employee or agent is proper in the circumstances. Such determination must be made (1) by the stockholders, (2) by the
board of directors by majority vote of a quorum consisting of directors who were not parties to the action, suit or proceeding,
(3) if a majority vote of a quorum consisting of directors who were not parties to the action, suit or proceeding so orders, by
independent legal counsel in a written opinion, or (4) if a quorum consisting of directors who were not parties to the action,
suit or proceeding cannot be obtained, by independent legal counsel in a written opinion.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 24; Options: NewSection; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">II-<!-- Field: Sequence; Type: Arabic; Name: PageNo -->1<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
amended and restated bylaws require us to indemnify our directors and officers in a manner that is consistent with the provisions
of Nevada law described in the preceding two paragraphs.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
maintain a general liability insurance policy that covers certain liabilities of directors and officers of our corporation arising
out of claims based on acts or omissions in their capacities as directors or officers. Furthermore, we have entered into indemnification
agreements with each of our directors and officers. These agreements, among other things, require us to indemnify each director
and executive officer to the fullest extent permitted by Nevada law, including indemnification of expenses such as attorneys&rsquo;
fees, judgments, fines and settlement amounts incurred by the director or officer in any action or proceeding, including any action
or proceeding by or in right of us, arising out of the person&rsquo;s services as a director or officer.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
16. Exhibits and Financial Statement Schedules.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: center; width: 0.75in"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibit</B></FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Number</B></FONT></P></TD>
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif; text-align: left; width: 0.1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif; vertical-align: bottom; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Description</B></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="vertical-align: bottom; font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315219004380/ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Amended and Restated Articles of Incorporation of the Company, as amended (previously filed by the Company as Exhibit 3.1 to the Company&rsquo;s Form 10-K, filed on April 1, 2019, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.2</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000114420411033319/v224667_ex3-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Correction to Amended and Restated Articles of Incorporation, as filed with the Nevada Secretary of State on May 25, 2011 (filed as Exhibit 3.2 to the Company&rsquo;s Current Report on Form 8-K filed June 1, 2011, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.3</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000114420416088535/v433391_ex3-3.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Articles of Merger (filed as Exhibit 3.3 to the Company&rsquo;s Form 10-K, filed on March 16, 2016, for the fiscal year ended December 31, 2015, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.4</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000114420416089066/v434815_ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Change Pursuant to NRS 78.209 (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed March 21, 2016, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.5</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000107878217000236/f8k021617_ex3z2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Change Pursuant to NRS 78.209 (filed as Exhibit 3.2 to the Company&rsquo;s Current Report on Form 8-K filed February 21, 2017, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.6</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220003119/ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Change Pursuant to NRS 78.209. (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed February 28, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.7</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000107878217000236/f8k021617_ex3z1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Designation of Rights, Preference and Privileges of Series A Convertible Preferred Stock (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed February 21, 2017, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.8</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315218004882/ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Designation of Rights, Preference and Privileges of Series B Convertible Preferred Stock (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed April 6, 2018, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.9</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315218009205/ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Designation of Rights, Preference and Privileges of Series C Convertible Preferred Stock of Sigma Labs, Inc. (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed June 26, 2018, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.10</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Designations (Series D Convertible Preferred Stock) (filed as Exhibit 10.2 to the Company&rsquo;s Current Report on Form 8-K filed on January 30, 2020 and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.11</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/ex10-7.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Designations (Series E Convertible Preferred Stock) (filed as Exhibit 10.7 to the Company&rsquo;s Current Report on Form 8-K filed January 30, 2020 and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.12</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220011520/ex3-1.htm" STYLE="-sec-extract: exhibit">Certificate of Amendment to Amended and Restated Articles of Incorporation, as amended, of Sigma Labs, Inc. (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed June 19, 2020 and incorporated herein by reference).</A></FONT></P></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.13</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000107878217001585/f10q093017_ex3z1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Amended and Restated Bylaws of the Company, as amended (filed as Exhibit 3.1 to the Company&rsquo;s Form 10-Q filed November 14, 2017, for the period ended September 30, 2017, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3.14</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220004679/ex3-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Amendment Number Two to Amended and Restated Bylaws of Sigma Labs, Inc (filed as Exhibit 3.1 to the Company&rsquo;s Current Report on Form 8-K filed on March 25, 2020 and incorporated herein by reference).</FONT></A></TD></TR>

<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315218004882/ex4-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Common Stock Purchase Warrant (filed as Exhibit 4.1 to the Company&rsquo;s Current Report on Form 8-K filed April 6, 2018, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.2</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315218004882/ex4-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Placement Agent Warrants (filed as Exhibit 4.2 to the Company&rsquo;s Current Report on Form 8-K filed April 6, 2018, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.3</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315218009205/ex4-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Common Stock Purchase Warrant.(filed as Exhibit 4.1 to the Company&rsquo;s Current Report on Form 8-K filed June 26, 2018, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.4</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315219003281/ex4-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Common Stock Purchase Warrant (filed as Exhibit 4.1 to the Company&rsquo;s Current Report on Form 8-K filed March 14, 2019, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.5</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315219003281/ex4-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Unit Purchase Option (filed as Exhibit 4.2 to the Company&rsquo;s Current Report on Form 8-K filed March 14, 2019, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.6</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315219006587/ex4-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Common Stock Purchase Warrant.(filed as Exhibit 4.1 to the Company&rsquo;s Current Report on Form 8-K filed May 8, 2019, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.7</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315219006587/ex4-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Placement Agent Warrant (filed as Exhibit 4.2 to the Company&rsquo;s Current Report on Form 8-K filed May 8, 2019, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.8</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/ex10-4.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Institutional Common Warrant (filed as Exhibit 10.4 to the Company&rsquo;s Current Report on Form 8-K, filed January 30, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

<!-- Field: Page; Sequence: 25; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">II-<!-- Field: Sequence; Type: Arabic; Name: PageNo -->2<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; width: 0.75in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.9</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/ex10-5.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Preferred Warrant (filed as Exhibit 10.5 to the Company&rsquo;s Current Report on Form 8-K, filed January 30, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.10</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220001399/ex10-8.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Class A Warrant(filed as Exhibit 10.8 to the Company&rsquo;s Current Report on Form 8-K, filed January 30, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.11</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005763/ex10-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Pre-Funded Warrant (filed as Exhibit 10.2 to the Company&rsquo;s Current Report on Form 8-K filed April 3, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.12</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005763/ex10-3.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Form of Common Stock Purchase Warrants (filed as Exhibit 10.3 to the Company&rsquo;s Current Report on Form 8-K filed April 3, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion of TroyGould PC (filed herewith).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">10.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="https://www.sec.gov/Archives/edgar/data/788611/000149315220005763/ex10-1.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Securities Purchase Agreement, dated as of April 2, 2020, between the Company and Purchasers (filed as Exhibit 10.1 to the Company&rsquo;s Current Report on Form 8-K filed April 3, 2020, and incorporated herein by reference).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><A HREF="ex23-1.htm">Consent of Haynie &amp; Company (filed herewith)</A></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.2</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of TroyGould PC (included in Exhibit 5.1).</FONT></A></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><A HREF="#Z_001"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Powers of Attorney (included on page II-5).</FONT></A></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item
17. Undertakings.</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">The
undersigned Registrant hereby undertakes:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)
To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 1.5in; text-align: justify; text-indent: -0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(i)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to
    include any prospectus required by Section 10(a)(3) of the Securities Act of 1933;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(ii)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to
    reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most
    recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information
    set forth in the registration statement (notwithstanding the foregoing, any increase or decrease in volume of securities offered
    (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low
    or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant
    to Rule 424(b) under the Securities Act if, in the aggregate, the changes in volume and price represent no more than a 20
    percent change in the maximum aggregate offering price set forth in the &ldquo;Calculation of Registration Fee&rdquo; table
    in the effective registration statement); and</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(iii)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">to
    include any material information with respect to the plan of distribution not previously disclosed in the registration statement
    or any material change to such information in the registration statement;</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><U>provided</U>,
<U>however</U>, that subparagraphs (i), (ii) and (iii) of this section do not apply if the information required to be included
in a post-effective amendment by those subparagraphs is contained in periodic reports filed with or furnished to the Commission
by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference
in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration
statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)
That, for the purpose of determining any liability under the Securities Act of 1933, each such post-effective amendment shall
be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at
that time shall be deemed to be the initial bona fide offering thereof.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 26; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">II-<!-- Field: Sequence; Type: Arabic; Name: PageNo -->3<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)
To remove from registration, by means of a post-effective amendment, any of the securities being registered which remain unsold
at the termination of the offering.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(4)
That, for the purpose of determining liability under the Securities Act of 1933 to any purchaser:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 1.5in; text-align: justify; text-indent: -0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 1in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(i)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">each
    prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as
    of the date the filed prospectus was deemed part of and included in the registration statement; and</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(ii)</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">each
    prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance
    on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information
    required by section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement
    as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract
    of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the
    issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration
    statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such
    securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however, that no statement
    made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated
    or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement
    will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that
    was made in the registration statement or prospectus that was part of the registration statement or made in any such document
    immediately prior to such effective date.</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(5)
That, for purposes of determining any liability under the Securities Act of 1933, each filing of the registrant&rsquo;s annual
report pursuant to Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934 (and, where applicable, each filing of
an employee benefit plan&rsquo;s annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934) that is incorporated
by reference in this registration statement shall be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(6)
Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and
controlling persons of the registrant, pursuant to the provisions described under Item 15 or otherwise, the Registrant has been
advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed
in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities
(other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection
with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by
controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against
public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 27; Value: 1 -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">II-<!-- Field: Sequence; Type: Arabic; Name: PageNo -->4<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SIGNATURES</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant
to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it
meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf
by the undersigned, thereunto duly authorized, in the City of Santa Fe, New Mexico, on this 9th day of July 2020.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Sigma
    Labs, Inc.</B></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Mark K. Ruport</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Mark
    K. Ruport</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President
    and Chief Executive Officer (Principal Executive Officer)</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B><A NAME="Z_001"></A>POWER
OF ATTORNEY</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in">KNOW ALL PERSONS BY
THESE PRESENTS, that each person whose signature appears below constitutes and appoints, jointly and severally, Mark K. Ruport
as his true and lawful attorney-in-fact and agent, with full power of substitution, for him and in his name, place and stead,
in any and all capacities, to sign any and all amendments (including post-effective amendments) to this registration statement
on Form S-3, and to sign any registration statement for the same offering covered by this registration statement that is to be
effective upon filing pursuant to Rule 462(b) promulgated under the Securities Act of 1933, and all post-effective amendments
thereto, and to file the same and all prospectus supplements, with all exhibits thereto and all documents in connection therewith,
with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent full power and authority to do and
perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and
purposes as he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his/her
substitute or substitutes, may lawfully do or cause to be done by virtue hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt; background-color: white">Pursuant
to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the
capacities and on the dates indicated.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Mark K. Ruport</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Mark
    K. Ruport</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President
    and Chief Executive Officer (Principal Executive Officer)</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Frank Orzechowski</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Frank
    Orzechowski</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Chief
        Financial Officer, Treasurer and Secretary</FONT></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal
        Accounting Officer and Principal Financial Officer)</FONT></P></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Salvatore Battinelli</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Salvatore
    Battinelli, Director</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Dennis Duitch</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dennis
    Duitch, Director</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Kent Summers</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Kent
    Summers, Director</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Dated:
    July 9, 2020</FONT></TD>
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    John Rice</I></FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">John
    Rice, Director, Chairman</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 28; Options: Last -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="text-align: center; width: 100%">II-<!-- Field: Sequence; Type: Arabic; Name: PageNo -->5<!-- Field: /Sequence --></TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"></FONT></P>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-5.1
<SEQUENCE>2
<FILENAME>ex5-1.htm
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="text-align: center; font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>EXHIBIT
5.1</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">TroyGould
PC<BR>
1801 Century Park East, 16th Floor<BR>
Los Angeles, California 90067</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">July
9, 2020</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Sigma
Labs, Inc.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">3900
Paseo del Sol</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Santa
Fe, New Mexico 87507</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Ladies
and Gentlemen:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
opinion letter is furnished to you in connection with the filing by Sigma Labs, Inc., a Nevada corporation (the &ldquo;<U>Company</U>&rdquo;),
with the Securities and Exchange Commission (the &ldquo;<U>Commission</U>&rdquo;) of a Registration Statement on Form S-3 (the
&ldquo;<U>Registration Statement</U>&rdquo;), including the prospectus contained therein (the &ldquo;<U>Prospectus</U>&rdquo;),
relating to the offer and sale by the selling stockholders named in the Prospectus of up to 515,465 shares (the &ldquo;<U>Warrant
Shares</U>&rdquo;) of the Company&rsquo;s common stock, par value $0.001 per share, that are issuable upon the exercise of certain
of the Company&rsquo;s outstanding warrants as described in the Prospectus (the &ldquo;<U>Warrants</U>&rdquo;). We have assumed
that the Warrant Shares will be offered and sold in the manner described in the Prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
have acted as counsel for the Company in connection with the Registration Statement. For purposes of this opinion letter, we have
examined and relied upon the Registration Statement, the Prospectus and such other documents, records, certificates and other
instruments as we have deemed necessary or appropriate.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Our
opinions herein are expressed solely with respect to the federal laws of the United States and the Nevada General Corporation
Law (including applicable rules and regulations promulgated under the Nevada General Corporation Law and applicable reported judicial
decisions interpreting the Nevada General Corporation Law).</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Based
upon and subject to the foregoing, we are of the opinion that the Warrant Shares, if and when issued and paid for upon exercise
of the Warrants as described in the Prospectus and in accordance with the terms of the Warrants, will be validly issued, fully
paid and non-assessable.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
hereby consent to your filing of this opinion letter as an exhibit to the Registration Statement and to the use of our name under
the caption &ldquo;Legal Matters&rdquo; in the Prospectus. Our consent shall not be deemed an admission that we are experts whose
consent is required under Section 7 of the Securities Act of 1933, as amended, or the rules and regulations of the Commission
thereunder.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">This
opinion letter may be used only in connection with the offer and sale of the Warrant Shares while the Registration Statement remains
effective.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Very
    truly yours,</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    TROYGOULD PC</I></FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<!-- Field: Page; Sequence: 1; Options: Last -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-23.1
<SEQUENCE>3
<FILENAME>ex23-1.htm
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="text-align: center; margin-top: 0; margin-bottom: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: right"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Exhibit
23.1</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>CONSENT
OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
consent to the use in this Registration Statement on Form S-3 of Sigma Labs, Inc. of our report dated March 24, 2020, relating
to our audits of the December 31, 2019 and 2018 financial statements, incorporated by reference in the Prospectus, which is part
of this Registration Statement.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">We
also consent to the reference to our firm under the caption &ldquo;Experts&rdquo; in such Prospectus.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="border-bottom: Black 1.5pt solid; font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><I>/s/
    Haynie &amp; Company</I></FONT></TD>
    <TD STYLE="padding-bottom: 1.5pt; font: 10pt Times New Roman, Times, Serif; width: 50%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Haynie
    &amp; Company</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Salt
    Lake City, Utah</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
<TR STYLE="font: 10pt Times New Roman, Times, Serif; vertical-align: top">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">July
    9, 2020</FONT></TD>
    <TD STYLE="font: 10pt Times New Roman, Times, Serif"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>


<!-- Field: Page; Sequence: 13; Options: Last -->
    <DIV STYLE="margin-bottom: 6pt; border-bottom: Black 1.5pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="border-collapse: collapse; width: 100%; font-size: 10pt"><TR STYLE="vertical-align: top; text-align: left"><TD STYLE="width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&nbsp;</FONT></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
