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Note J - Intangible Assets - Summary of Intangible Assets (Details) - Patents [Member] - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Gross carrying amount $ 380,080 $ 378,344
Accumulated amortization (210,694) (182,438)
Write-offs (15,000)  
Net carrying amount $ 154,386 $ 195,906