Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets and Liabilities Other Than Goodwill

Intangible Assets and Liabilities Other Than Goodwill

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets and Liabilities Other Than Goodwill

As of March 31, 2021 and December 31, 2020 the Company had the following amounts related to intangible assets and liabilities other than goodwill:


	March 31, 2021						December 31, 2020
Intangible assets	Cost		Accumulated Amortization		Total		Cost		Accumulated Amortization		Total
Product certifications	$	726,160	$	(491,950)	$	234,210	$	726,159	$	(478,357)	$	247,802
Patents	853,296		(244,810)		608,486		855,014		(220,764)		634,250
Developed technology	240,000		(128,000)		112,000		240,000		(124,000)		116,000
Trademarks	26,896		—		26,896		26,896		—		26,896
In Process R&D	263,936		—		263,936		263,936		—		263,936
Favorable contract asset	384,465		(324,290)		60,175		384,465		(313,030)		71,435

	$	2,494,753	$	(1,189,050)	$	1,305,703	$	2,496,470	$	(1,136,151)	$	1,360,319

Intangible liability
Unfavorable contract liability	$	2,534,818	$	(1,007,153)	$	1,527,665	$	2,534,818	$	(917,767)	$	1,617,051

The aggregate amortization expense related to intangible assets and liabilities exclusive of contract related intangibles for the three months ended March 31, 2021 and 2020 was $42,890 and $22,816, respectively. The net credit to cost of sales related to the amortization of contract related intangible assets and liabilities for the three months ended March 31, 2021 and 2020 was $79,053 and $107,998, respectively. During the three months ended March 31, 2021 and 2020, we abandoned certain patent applications amounting to $7,400 and $179,944, respectively, and recorded an abandonment charge in general and administrative expenses in each respective period

Favorable/Unfavorable Contract Assets and Liabilities

The favorable contract asset and unfavorable contract liability in the foregoing table represent the estimated fair value of American DG Energy's customer contracts (both positive for favorable contracts and negative for unfavorable contracts) which were acquired by us in May 2017.

Amortization of intangibles including contract related amounts is calculated using the straight-line method over the remaining useful life or contract term. Aggregate future amortization over the next five years is estimated to be as follows:


Year 1	$	(120,704)
Year 2	(106,386)
Year 3	(53,634)
Year 4	(21,374)
Year 5 and thereafter	53,239
Total	$	(248,859)