Annual report pursuant to Section 13 and 15(d)

Note 6 - Patents (Tables)

v3.19.1
Note 6 - Patents (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
    2018   2017
Patent asset   $
2,006,443
    $
2,028,557
 
Accumulated amortization    
(1,242,900
)    
(1,145,095
)
Net intangibles   $
763,543
    $
883,462