Quarterly report pursuant to Section 13 or 15(d)

PATENTS (Details)

v3.20.1
PATENTS (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Patents, net $ 1,755,000 $ 1,819,000
Patents [Member]    
Gross carrying amount - patents 7,805,000 7,797,000
Accumulated amortization - patents (6,050,000) (5,978,000)
Patents, net $ 1,755,000 $ 1,819,000