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Patents and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2021

Patents and Other Intangible Assets

Schedule of Patents and other intangible assets

Patents and other intangible assets are summarized as follows:

		March 31,			December 31,
		2021			2020
		(Unaudited)
Patents
Patents pending		$	763,000		$	731,000
Issued patents			883,000			883,000
			1,646,000			1,614,000
Trademarks
Trademarks pending			107,000			105,000
Registered trademarks			23,000			23,000
			130,000			128,000
Other			8,000			8,000
			1,784,000			1,750,000
Accumulated amortization			(486,000)			(448,000)
		$	1,298,000		$	1,302,000

Schedule of future amortization expense

Future amortization expense associated with issued patents and registered trademarks as of March 31, 2021 is estimated as follows (unaudited):

2021 (remaining 9 months)			114,000
2022			125,000
2023			91,000
2024			63,000
Thereafter			27,000
		$	420,000

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