Quarterly report pursuant to Section 13 or 15(d)

A. SUMMARY OF ACCOUNTING POLICIES (Details)

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A. SUMMARY OF ACCOUNTING POLICIES (Details) (USD $)
6 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Product warranties    
Beginning balance $ 69,743 $ 104,423
Warranty expenses incurred (4,429) (66,278)
Provision charged to expense 12,129 31,598
Ending balance $ 77,443 $ 69,743