PATENTS (Tables)

6 Months Ended

Jun. 30, 2021

Patents

The Company’s intangible assets at June 30, 2021 include patents with estimated remaining economic useful lives ranging from 0.25 to 12.25 years. For all periods presented, all of the Company’s patents were subject to amortization. The gross carrying amounts and accumulated amortization related to acquired intangible assets as of June 30, 2021 and December 31, 2020 were as follows:

The Company’s intangible assets at June 30, 2021 include patents with estimated remaining economic useful lives ranging from 0.25 to 12.25 years. For all periods presented, all of the Company’s patents were subject to amortization. The gross carrying amounts and accumulated amortization related to acquired intangible assets as of June 30, 2021 and December 31, 2020 were as follows:

	June 30, 2021			December 31, 2020
Gross carrying amount – patents	$	7,915,000		$	7,848,000
Accumulated amortization – patents		(6,417,000	)		(6,270,000	)
Patents, net	$	1,498,000		$	1,578,000

Amortization expense for the three months ended June 30, 2021 and 2020 was $73,000 and $72,000, respectively. Amortization expense for the six months ended June 30, 2021 and 2020 was $147,000 and $144,000, respectively. Future amortization of intangible assets, net is as follows:

Amortization expense for the three months ended June 30, 2021 and 2020 was $73,000 and $72,000, respectively. Amortization expense for the six months ended June 30, 2021 and 2020 was $147,000 and $144,000, respectively. Future amortization of intangible assets, net is as follows:

Twelve Months Ended June 30,
	2022	$	296,000
	2023		296,000
	2024		126,000
	2025		86,000
	2026 and thereafter		694,000
	Total	$	1,498,000