Annual report pursuant to Section 13 and 15(d)

A. SUMMARY OF ACCOUNTING POLICIES (Details-Product warranties)

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A. SUMMARY OF ACCOUNTING POLICIES (Details-Product warranties) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Product warranties    
Beginning balance $ 28,702 $ 23,500
Warranty claims incurred (50,353) (16,434)
Provision charged to expense 70,800 21,636
Ending balance $ 49,149 $ 28,702