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Patents and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2021

Patents and Other Intangible Assets

Schedule of Patents and other intangible assets

Patents and other intangible assets are summarized as follows:

​

​	​	​	​	​	​	​
​		September 30,			December 31,
​	​	2021		​	2020
Patents		​			​
Patents pending	​	$	596,000	​	$	731,000
Issued patents	​		538,000	​		883,000
​	​		1,134,000	​		1,614,000
Trademarks	​		​	​		​
Trademarks pending	​		1,000	​		105,000
Registered trademarks	​		95,000	​		23,000
​	​		96,000	​		128,000
Other	​		8,000	​		8,000
​	​		1,238,000	​		1,750,000
Accumulated amortization	​		(296,000)	​		(448,000)
​	​	$	942,000	​	$	1,302,000

​

Schedule of future amortization expense

Future amortization expense associated with issued patents and registered trademarks as of September 30, 2021 is as follows:

​

​	​	​	​
2021 (remaining 3 months)		$	28,000
2022	​		114,000
2023	​		91,000
2024	​		67,000
2025	​		32,000
Thereafter	​	​	6,000
​	​	$	338,000

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