Quarterly report [Sections 13 or 15(d)]

PATENTS (Details)

v3.25.1
PATENTS (Details) - USD ($)
Mar. 31, 2025
Dec. 31, 2024
Patents    
Gross carrying amount – patents $ 8,887,000 $ 8,473,000
Accumulated amortization – patents (7,298,000) (7,268,000)
Patents, net $ 1,589,000 $ 1,205,000