<SEC-DOCUMENT>0001144204-15-009080.txt : 20150213
<SEC-HEADER>0001144204-15-009080.hdr.sgml : 20150213
<ACCEPTANCE-DATETIME>20150213163129
ACCESSION NUMBER:		0001144204-15-009080
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20150212
ITEM INFORMATION:		Regulation FD Disclosure
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20150213
DATE AS OF CHANGE:		20150213

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			CLEARSIGN COMBUSTION CORP
		CENTRAL INDEX KEY:			0001434524
		STANDARD INDUSTRIAL CLASSIFICATION:	INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL [3823]
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			WA

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35521
		FILM NUMBER:		15615208

	BUSINESS ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
		BUSINESS PHONE:		(206) 673-4848

	MAIL ADDRESS:	
		STREET 1:		12870 INTERURBAN AVENUE SOUTH
		CITY:			SEATTLE
		STATE:			WA
		ZIP:			98168
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>v401741_8k.htm
<DESCRIPTION>8-K
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

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



<P STYLE="font: 18pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"></P>

<!-- Field: Rule-Page --><DIV ALIGN="CENTER" STYLE="margin-top: 3pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 1.5pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>WASHINGTON, D.C. 20549 </B></P>

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

<HR SIZE="2" NOSHADE ALIGN="CENTER" STYLE="width: 21%; color: black">

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

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>FORM 8-K </B></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Pursuant to Section 13 or 15(d) of the
</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Securities Exchange Act of 1934 </B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Date of report (Date of earliest event
reported): February 12, 2015</B></P>

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

<HR SIZE="2" NOSHADE ALIGN="CENTER" STYLE="width: 21%; color: black">

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

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>CLEARSIGN COMBUSTION CORPORATION</B></P>

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

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

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr>
    <TD STYLE="vertical-align: top; width: 33%; text-align: center; padding: 0"><font style="font: 10pt Times New Roman, Times, Serif"><b>Washington</b></font></td>
    <TD STYLE="vertical-align: bottom; width: 1%; padding: 0; text-align: center">&nbsp;</td>
    <TD STYLE="vertical-align: top; width: 32%; text-align: center; padding: 0"><font style="font: 10pt Times New Roman, Times, Serif"><b>001-35521</b></font></td>
    <TD STYLE="vertical-align: bottom; width: 1%; padding: 0; text-align: center">&nbsp;</td>
    <TD STYLE="vertical-align: top; width: 33%; text-align: center; padding: 0"><font style="font: 10pt Times New Roman, Times, Serif"><b>26-2056298</b></font></td></tr>
<tr>
    <TD STYLE="vertical-align: top; padding: 0; text-align: center">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><b>(State or other jurisdiction of</b></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><b>incorporation or organization)</b></P></td>
    <TD STYLE="vertical-align: bottom; padding: 0; text-align: center">&nbsp;</td>
    <TD STYLE="vertical-align: top; text-align: center; padding: 0"><font style="font: 10pt Times New Roman, Times, Serif"><b>(Commission File No.)</b></font></td>
    <TD STYLE="vertical-align: bottom; padding: 0; text-align: center">&nbsp;</td>
    <TD STYLE="vertical-align: top; text-align: center; padding: 0"><font style="font: 10pt Times New Roman, Times, Serif"><b>(IRS Employee Identification No.)</b></font></td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>12870 Interurban Avenue South</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>Seattle, Washington 98168</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>(Address of Principal Executive Offices)
</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>206-673-4848</B></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions (see General Instruction
A.2 below).</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left">&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD>
</TR></TABLE>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)</FONT></TD>
</TR></TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR240.14a-12)</FONT></TD>
</TR></TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)).</FONT></TD>
</TR></TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left"><FONT STYLE="font-family: Wingdings">&uml;</FONT></TD><TD STYLE="text-align: justify"><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement
communications pursuant to Rule 13e-(c) under the Exchange Act (17 CFR 240.13(e)-4(c))</FONT></TD>
</TR></TABLE>







<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0; margin-bottom: 0"><TR STYLE="vertical-align: top; text-align: justify">
<TD STYLE="width: 0in"></TD><TD STYLE="width: 0.25in; text-align: left">&nbsp;</TD><TD STYLE="text-align: justify">&nbsp;</TD>
</TR></TABLE>

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

<!-- Field: Rule-Page --><DIV ALIGN="CENTER" STYLE="margin-top: 3pt; margin-bottom: 3pt"><DIV STYLE="font-size: 1pt; border-top: Black 1.5pt solid; width: 100%">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

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

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


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

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

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 96px; text-align: justify; font-size: 10pt"><font style="font: 10pt Times New Roman, Times, Serif"><b>Item 7.01</b></font></td>
    <td style="text-align: justify; font-size: 10pt"><font style="font: 10pt Times New Roman, Times, Serif"><b>Regulation FD Disclosure.</b></font></td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">On February 12, 2015,
the Company issued a press release announcing that it completed the public offering announced on February 5, 2015 of 2,990,000
shares of its common stock, which includes the exercise in full of the underwriter&rsquo;s overallotment option consisting of 390,000
shares of common stock, at a price of $5.85 per share. MDB Capital Group, LLC was the underwriter for the offering. The common
stock was offered pursuant to the Company&rsquo;s registration statement on Form S-3 (File No. 333-188381). The Company&rsquo;s
press release is attached as Exhibit 99.1 to this Report and is incorporated herein by reference.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0.5in">The information disclosed
under this Item 7.01, including Exhibit 99.1 hereto, shall not be deemed &ldquo;filed&rdquo; for purposes of Section 18 of the
Exchange Act and shall not be deemed incorporated by reference into any filing made under the Securities Act except as expressly
set forth by specific reference in such filing.</P>

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

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td style="width: 96px; text-align: justify; font-size: 10pt"><font style="font: 10pt Times New Roman, Times, Serif"><b>Item 9.01</b></font></td>
    <td style="text-align: justify; font-size: 10pt"><font style="font: 10pt Times New Roman, Times, Serif"><b>Financial Statements and Exhibits.</b></font></td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td><font style="font: 10pt Times New Roman, Times, Serif">(d)</font></td>
    <td><font style="font: 10pt Times New Roman, Times, Serif">Exhibits.</font></td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td style="width: 5%"><font style="font: 10pt Times New Roman, Times, Serif">99.1</font></td>
    <td style="width: 95%"><font style="font: 10pt Times New Roman, Times, Serif">Press Release issued February 12, 2015</font></td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td>&nbsp;</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>


<!-- Field: Page; Sequence: 2 -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font-size: 10pt"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <DIV STYLE="page-break-before: always; margin-top: 6pt; margin-bottom: 12pt"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Pursuant to the requirements of the Securities
Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</P>

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

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

<table cellspacing="0" cellpadding="0" style="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<tr style="vertical-align: top">
    <td><font style="font: 10pt Times New Roman, Times, Serif">Dated:&nbsp;&nbsp;February 13, 2015</font></td>
    <td colspan="2"><font style="font: 10pt Times New Roman, Times, Serif">CLEARSIGN COMBUSTION CORPORATION</font></td>
    <td>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td style="width: 50%">&nbsp;</td>
    <td style="width: 5%">&nbsp;</td>
    <td style="width: 35%">&nbsp;</td>
    <td style="width: 10%">&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td><font style="font: 10pt Times New Roman, Times, Serif">By:</font></td>
    <td style="border-bottom: black 1pt solid"><font style="font: 10pt Times New Roman, Times, Serif">/s/ James N. Harmon</font></td>
    <td>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td><font style="font: 10pt Times New Roman, Times, Serif">James N. Harmon</font></td>
    <td>&nbsp;</td></tr>
<tr style="vertical-align: top">
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td><font style="font: 10pt Times New Roman, Times, Serif">Chief Financial Officer</font></td>
    <td>&nbsp;</td></tr>
</table>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

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



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

<!-- Field: Page; Sequence: 3; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font-size: 10pt"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

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

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>v401741_ex99-1.htm
<DESCRIPTION>EXHIBIT 99.1
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0; text-align: right"><B>Exhibit 99.1</B></P>

<P STYLE="margin: 0; text-align: right"><B>&nbsp;</B></P>

<P STYLE="margin: 0; text-align: left"><B>&nbsp;</B></P>

<P STYLE="margin: 0; text-align: left"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B><IMG SRC="image_001.jpg" ALT=""></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B>ClearSign Combustion Corp. Announces
Completion of Public Offering, Including the Exercise of the Underwriter&rsquo;s Entire Overallotment Option</B></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>SEATTLE, February 12, 2015 &ndash;</B> <U>ClearSign Combustion
Corporation</U> (NASDAQ: CLIR) (the &ldquo;Company&rdquo;) announced today that it completed the public offering announced on
February 5, 2015 of 2,990,000 shares of its common stock, which includes the exercise in full of the underwriter&rsquo;s overallotment
option consisting of 390,000 shares of common stock, at a price of $5.85 per share. MDB Capital Group, LLC was the underwriter
for the offering. Total gross proceeds of the Company&rsquo;s public offering were approximately $17.5 million.</P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">The securities described above were offered by the Company
pursuant to a shelf registration statement that was previously filed with and declared effective by the Securities and Exchange
Commission (SEC). This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities
in this offering, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation
or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction.
A final prospectus supplement related to the offering was filed with the SEC and is available on the SEC&rsquo;s website located
at <U>www.sec.gov</U>. Copies of the final prospectus supplement and the accompanying prospectus relating to this offering, when
available, may be obtained, by sending a request to: MDB Capital Group, LLC, <FONT STYLE="background-color: white">401 Wilshire
Boulevard, Suite 1020, Santa Monica, CA 90401, (310) 526-5000.</FONT></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><B>About MDB Capital Group</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">MDB Capital Group finances development stage companies that
possess meaningful technology that has the potential to impact large commercial markets and benefit humanity. &nbsp;MDB maximizes
the value of these technology companies by helping position them to be the dominant leader in their technology domain and connecting
them with a base of high-quality investors.&nbsp; For more information, please visit&nbsp;<FONT STYLE="color: #324FE1">www.mdb.com</FONT></P>

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>About ClearSign Combustion Corporation</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 4.5pt"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">ClearSign Combustion Corporation designs and develops technologies
that aim to improve key performance characteristics of combustion systems including energy efficiency, emissions control, fuel
flexibility and overall cost effectiveness. Our patent-pending Duplex&trade; and Electrodynamic Combustion Control&trade; platform
technologies improve control of flame shape and heat transfer and optimize the complex chemical reactions that occur during combustion
in order to minimize harmful emissions. For more information about the Company, please visit <U>www.clearsign.com</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white; color: #373737">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white; color: #373737"></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white; color: #373737"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white; color: #373737">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><B>Cautionary note on forward-looking
statements</B></P>

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">This communication includes forward-looking statements <FONT STYLE="background-color: white">within
the meaning of the Private Securities Litigation Reform Act of 1995 and the provisions of Section 27A of the Securities Act of
1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended,</FONT> regarding the completion, timing and
size of the proposed public offering. Such forward looking statements involve risks and uncertainties, including, without limitation,
risks and uncertainties related to market conditions and the satisfaction of closing conditions related to the proposed public
offering. Such statements involve known and unknown risks that relate to future events or future financial performance and the
actual results could differ materially from those discussed in this communication. There can be no assurance that ClearSign will
be able to complete the proposed public offering. Risks and uncertainties that may cause ClearSign&rsquo;s actual results to differ
materially from those discussed in this communication can be found in the &ldquo;Risk Factors&rdquo; section of ClearSign&rsquo;s
Form 10-K, Forms 10-Q and other filings with the SEC. Readers are cautioned not to place undue reliance on these forward-looking
statements that speak only as of the date hereof, and ClearSign assumes no responsibility to update or revise any forward-looking
statements contained in this communication to reflect events, trends or circumstances after the date of this communication.</P>

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

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

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

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><B>For further information:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><B>Media:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">Alberto Gestri</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">Antenna Group for ClearSign</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">+1 415-464-6319</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><U>clearsign@antennagroup.com</U></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white; color: #373737">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><B>Investor Relations:</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white">+1 206-673-4848</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; background-color: white"><U>investors@clearsign.com</U><FONT STYLE="color: #373737">
</FONT></P>

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



<P STYLE="margin: 0; text-align: left"></P>

<!-- Field: Page; Sequence: 2; Options: Last -->
    <DIV STYLE="margin-top: 12pt; margin-bottom: 6pt; border-bottom: Black 1pt solid"><TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font-size: 10pt"><TR><TD STYLE="text-align: center; width: 100%">&nbsp;</TD></TR></TABLE></DIV>
    <!-- Field: /Page -->

<P STYLE="margin: 0; text-align: left"><B>&nbsp;</B></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>image_001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
begin 644 image_001.jpg
M_]C_X``02D9)1@`!`0```0`!``#_VP!#``@&!@<&!0@'!P<)"0@*#!0-#`L+
M#!D2$P\4'1H?'AT:'!P@)"XG("(L(QP<*#<I+#`Q-#0T'R<Y/3@R/"XS-#+_
MVP!#`0D)"0P+#!@-#1@R(1PA,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C(R
M,C(R,C(R,C(R,C(R,C(R,C(R,C(R,C+_P``1"`!3`.T#`2(``A$!`Q$!_\0`
M'P```04!`0$!`0$```````````$"`P0%!@<("0H+_\0`M1```@$#`P($`P4%
M!`0```%]`0(#``01!1(A,4$&$U%A!R)Q%#*!D:$((T*QP152T?`D,V)R@@D*
M%A<8&1HE)B<H*2HT-38W.#DZ0T1%1D=(24I35%565UA96F-D969G:&EJ<W1U
M=G=X>7J#A(6&AXB)BI*3E)66EYB9FJ*CI*6FIZBIJK*SM+6VM[BYNL+#Q,7&
MQ\C)RM+3U-76U]C9VN'BX^3EYN?HZ>KQ\O/T]?;W^/GZ_\0`'P$``P$!`0$!
M`0$!`0````````$"`P0%!@<("0H+_\0`M1$``@$"!`0#!`<%!`0``0)W``$"
M`Q$$!2$Q!A)!40=A<1,B,H$(%$*1H;'!"2,S4O`58G+1"A8D-.$E\1<8&1HF
M)R@I*C4V-S@Y.D-$149'2$E*4U155E=865IC9&5F9VAI:G-T=79W>'EZ@H.$
MA8:'B(F*DI.4E9:7F)F:HJ.DI::GJ*FJLK.TM;:WN+FZPL/$Q<;'R,G*TM/4
MU=;7V-G:XN/DY>;GZ.GJ\O/T]?;W^/GZ_]H`#`,!``(1`Q$`/P#W^BBB@`HH
MHH`****`"BBB@`HHHH`****`"BBB@`HHHH`****`"BBB@`HHHH`****`"BBB
M@`HHHH`****`"HKB>.VA>65@J*,DFI":X[7M2?4-173[7+JK;<+_`!O_`("L
MZLW"+<5=DR=D7K#Q()[]HYU"02'$9[K]?K71@Y%<?J'AU[;3EGC8R2QC,RCN
M/4?2M+PUJ_VZW-O*V9HAP3_$OK7-AI5HODK?(F#EM(WZ*,UEZQK]AHL0:ZD)
MD892).6;_P"M[UW)-NR-+V-2BO/IOB-.)#Y6GQ*G_320Y_2K^F>/[2X=8[^!
MK4DX\P-N3\>XJW2FNA/,CLJ*RM;UA=)TAK]8Q.H*@`-C=D^M+H&K_P!MZ8+P
MP^5EV3;NSTJ.5VN.YJ44F12Y%(84444`%%)N%&10`M%&11F@`HS5/4]4LM(T
MZ:_O[A+>VA&YY'/`_P`3[5Y1JGQT1)S'I6CF2/G;)=2["WT4`G]:TA2G/X43
M*:CN>Q9I:\8T[XZLTX74=%41YPS6TV67_@+#G\Z]+T[Q3IFM:!-JVESBYBC1
MBR#AU8#.UAU!HG1G#XD*,XRV9N45QG@G7KW5);R"\D,I&)D?^Z"?N_3TKLLU
M,HN+LRD[BT4F:,BI&+129%&10`M%&110!D^(]3&E:+-.&`D;Y(R?[Q_PY-8/
MAN&#3-(DUV_;:"I,>>H7V]V-.\;PM>W.CV`)"W$Y!Q^`_D363XXU$->0Z1!A
M;>U4%E!X+8X'X#^=:QIJ5D0WK<N:5XU>35W6^*K:3G"?],?3)]/6H]:1O#.O
MP7\`Q:RMN`'0?WE_+D5Q1Y!'K7:6\_\`;_@*Z@F^>YL!D$]2!R#^61^%:3HQ
MBTR$[G;S7D4&GR7A(,21F7/J,9KRW3K2Z\6>(&,TI&_]Y,W]Q.P'\A780>;>
M_#4!<M(;,@>I`_\`K"L3X>7$::G=0L0'EB!3WP>1^M*G[L9-;ERU:1VMGH.E
MV4`BAL8<8Y+(&)^I-8VL^"+*^E26S*V;%OWH1<JR^P[&NK'2DS6*G).Z95D<
MEXIL(=-\%&SM]_E1N@7>VX_>]:G\!_\`(M+_`-=I/YT_QS_R+$W_`%T3_P!"
MJKX/D:'P;+*G+(TS`>XYK3>E\R?M#/$'C,V-TUAIL2S7*G:[L"55O[H`ZFLF
M36?&5FGVJXA<0#DA[<8`]\<BL'1-0FL=2^VQ68NY]I(!R=I/\7'?_&NF/C?5
MR"IT52#P?E?!_2M73Y=%&Y/-<W?#?BB'7$:)T$-VB[F3.0P]5_PI_B/Q-#H4
M*J$$UW(,I'G``]6]JX/1_M4/B>UNHK.:!&N.4$;;55N",XZ<U9O$&K?$![>Y
M.8VN1$5/]U1T_''ZU/LH\_EN/FT+$?B'Q=>J;FVAD,/4>7;`K^&>M$WCW5!;
M(B0Q1W*,1*63AO3C/!ZY%>CHBH@1%"JHP`.`!7GOQ"LH(;FVNXU"RS*RR`?Q
M8Q@_KBE3E"4K.(--*]SI=2U>ZM/"*:G'Y?VDQ1N<KE<MC/'XURA\8>(+ZV"6
M<):6/+2R0P;N.PQSBMS6^?AS'_UPA_FM2?#]1_PC\K8&6N&R>YX%*/+&#E;J
M/5NQQ/QE;4!X7T!+EMRM,3<LHPOF;/EX_P"^ORI_PGU/PC9>'UBFFL[?6&=O
MM#7156;GY=I/\.,<"O3=:T6PU[3)=/U*W6>VEQE2<$$="".01ZUY=J'P*AD=
MFTW6W1#RJ7,(?'_`@1_*KA.G*G[.3L1*,E+F6IW6N>%?#GC&Q:.6.W>3'R75
MJ5\R,^H8=?H<BK-EHMCX2\+SV^DP+$L$#R;F&3(X4G<Y[GBO#]=^&?B3PG9R
M:G%<12P0#<\UE(R/&/[V.#@>U=K\/?%]_K_A;7=.U.9KBXL[5GCG;[SQLK##
M'N01U]Z)TGR7C*Z",];-698^$WB[4?$MUJ45[#91+%''*/LT'EY9B<D\\]*3
MQY\5CH=_)I&APQ37D1VSW$O*1-_=`'WF]>PZ<USWP.D:*;7)5&62SB8#U(W5
ME_":R@UKQX]U?@2R1127:K)SNE+#GGTW$UI*E!3E)K1="5)\J7<N#QM\3[&`
M:G=6=PUE]X^=8`)CWP`0/>M31?BOK.N>-=-LH8K>'3[J6.-XV3<Z_+\V&SR,
M]#CI7LV`R$,`01R#T-?/HTVUTGX[6]E9*JVZ:@C(B]$W)N*CV!)J:<H5%*\4
MK(<E*-M3J_'WQ%UKPQXR33K3[-]B$44CAX=SX).[!SZ"L"^^(WCS6&EO=#L)
MK?34;Y##9^<-N>K.0<GUQQ57XM1+/\3887^Y+#;(V/0N0?YU[[;V\5I;1V\$
M:QPQ*$1%&`H'0"DW"G"+Y;M@E*4FKGF/P[^*$^OZBNCZU'$MXX/D7$:[1*1R
M5*]FQG\J]3%?/OB"WCT[XZPK:J(E:^MI,*.-S!=WY\_G7T#6=>,5:4>J+IMM
M-/H9.MV#7'V*[C7=+9W"S;1U9>C`?@<_A7F_BB-X_$M_Y@/SN'4^JD#%>O8K
M)UKP]9:Y$HN`4E0829.&7V]Q[5-*IR/4<HW/(:ZKPA!<2:?K!A0MYT8MT]"Y
MSS^`.36A;_#L"Y)N-0+0`YQ''AF'X]*[*RL;?3[2.VMHQ'$@X4?S/J:UJUHM
M6B*,6G=C;"RCL=.@LD^9(8Q'SWP*\YU_P_>^']0^W6/F&V#[XI4&3$?0^WOZ
M5ZC2%0PP>0>HK"$W%W+<;G`6?Q%D6`+=6(D<#[\3[0WX=JS;_P`3ZQK]U%#9
M(\.U@R16Y)8GL2?\BN^F\.://)YDFFVQ?U"`?RJW:V%K9)LM;>*%>XC0#-7[
M2"U4=2;2[F-J>FZCJ?A!K2Z:-]0*!CLX4L#G']*YSPAK;V,W]AW-I(?-E(``
M^9"1R&'IQUKT3'%0FSMS=+=&&/[0H*B7;\P![9J5/1Q:&XZW/-)HK[P5X@\^
M-"]LV0C'A9$/\)/8C^E=!)\0[$6VZ.TN#-C[C8`!_P![-==+!'/&8YD61#U5
MQD&L]?#>C))YBZ9:ANN?+'\JISC+XEJ+E:V,7PIK&N:M/--=11FQ))63;M(/
M8+ZCZUD>,](N;#5/[:M0WELRN[*,^4X[_0\5Z(JA5"@``<``8Q0RA@00"#P0
M:E5+2ND/ENK'#VGQ#A%KB[LY#<`<F)AM8^O/2N5UW5KK6YQ?3QB.#F.%1T`'
M)Y[GUKT]_#FC/)YCZ;;%^N?+'\JM2:;931I'+:0.B<*K1@A?H.U7&I"+ND+E
M;W9S6MD?\*ZC.>/(@_FM2?#\_P#%.OC_`)^'_D*Z5[2"2W^SO#&T(`'EE05P
M.G%+;VT%I'Y=O#'$F<[44*,_A6;G[O*.VMSA/BFWBG^P57058VIS]L:WSYX7
MMMQ_#ZD<_A7#>'_C5J6GVRVNKV8U'RQM$ROY<O'][C!/OQ7O!%8^H^$O#^KR
M>;J&CV5Q(>2[1#<?J1R:TIU(*/+.-R90E>Z9XQXL^+5YXDTN72+'3OLD5R/+
MD8R>9+(I_A4`<9_$UU'P^\(W>@>#]:U+4HVANKZU8+"W#1QJC8W>A))..W%>
M@Z;X6T+1W#Z=I-G;2#H\<(W#\>M:CQK)&R.H9&!#*1D$'M3E6CR\D%9"4'>\
MF>(_`8AK[6,$'_1H?YM6-XCT?6?AKXR.L:<C"R,K26\Y!:/:W6)_3KC\B*]\
MLM&TW3&=K"PM;5G`#&"%4W`=,X'->>^._B1=^&?$$&F-HGFV.`TTEQTN%/41
M]N/?\N]7&K*=5N*WZ"<%&.K,27XZSR6/EVNAH+YA@,9]Z;O4*!D_2N2\.1ZB
MGQ6TIM761=0EO$FF$GWLNN[D=N"..W2NZ;XH^"["#[5I?A]OMY&546L<6&]W
M']*ROAMI6I>*_&\OC#44/D1NT@DQA9)2,!4]54=_85JK0C)\O*B'>36MRE\5
M&'_"U;,$C.RU[_\`30U[_5"YT/2[ZY%U=Z=:3W`QB66%688Z<D9XJ^!BN.=3
MGC%6V-HQLV^YX%XN8?\`"][<9&?M5IW]EKWVJ$VAZ5<7PO9M.M)+L$$3O`I<
M$=/FQGBK^/>G4J*:BNP1CRW\Q:***R+"BBB@`HHHH`****`"BBB@`HHHH`**
M**`"BBB@`HHHH`****`"BBB@`JGJ.EV.K6IM=0LX;J`_P2H&'U]JN44`<C!\
M,?!UO<><FA0%@<A7=G4?\!)Q75Q0QP1+%%&L<:#"H@``'H`*?13<I2W8DDM@
M%%%%(84444`%%%%`!1110`4444`%%%%`!1110`4444`%%%%`!1110`4444`%
:%%%`!1110`4444`%%%%`!1110`4444`?_]D_
`
end
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
