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Patents and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2023

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,		​
(in thousands)		2023			2022
Patents	​	​	​	​	​	​	​
Patents pending	​	$	330	​	$	307	​
Issued patents	​		815	​		815	​
​	​		1,145	​		1,122	​
Trademarks	​		​	​		​	​
Trademarks pending	​		7	​		6	​
Registered trademarks	​		95	​		95	​
​	​		102	​		101	​
Other	​		8	​		8	​
​	​		1,255	​		1,231	​
Accumulated amortization	​		(473)	​		(433)	​
​	​	$	782	​	$	798	​

​

Schedule of future amortization expense

Future amortization expense associated with issued patents and registered trademarks as of March 31, 2023 is as follows:

​

​	​	​	​
(in thousands)	​	​	​
2023		$	108
2024	​		126
2025	​		96
2026	​		61
2027	​		39
Thereafter	​		7
​	​	$	437

​

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