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Note H - Patents
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Goodwill and Intangible Assets Disclosure [Text Block]
NOTE H
— PATENTS
 
Patents are amortized utilizing the straight-line method over estimated useful lives ranging from
10
to
20
years, with a weighted average amortization period of
12
years. Amortization expense amounted to
$70,699
in
2016
and
$69,428
in
2015.