Quarterly report pursuant to Section 13 or 15(d)

PATENTS (Details)

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PATENTS (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Patents    
Gross carrying amount – patents $ 8,473,000 $ 8,473,000
Accumulated amortization – patents (7,207,000) (7,147,000)
Patents, net $ 1,266,000 $ 1,326,000