Intangible Assets

6 Months Ended

Jun. 30, 2019

6 — Intangible Assets

The following table summarizes the components of intangible asset balances:


	June 30,		December 31,
	2019		2018
	(unaudited)
Patents — in use	$	304,270	$	304,270
Patents — in process		87,053		73,164
Internally developed software — in use		867,569		867,569
Internally developed software — in process		34,233		13,723
Trademarks		23,017		23,017
		1,316,142		1,281,743
Accumulated amortization		(494,205)		(449,224)
Total	$	821,937	$	832,519

Amortization expense of intangible assets was $22,490 and $22,491 for the three months ended June 30, 2019 and 2018, respectively, and $44,981 and $44,351 for the six months ended June 30, 2019 and 2018, respectively.

Expected annual amortization expense for the remaining portion of 2019 and the next five years related to intangible assets is as follows (excludes in process intangible assets):


Six months ending December 31, 2019	$	44,982
2020		89,963
2021		89,963
2022		89,392
2023		88,740
2024		88,439