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6. PATENTS (Tables)
 6 Months Ended
Jun. 30, 2015
Patents Tables  
Patents
    June 30, 2015 Cost    

Accumulated

Amortization

     June 30, 2015 Net  
Patents   $ 212,357     $ 92,809     $ 119,548  
                         

 

   

December 31,

2014 Cost

    

Accumulated

Amortization

    

December 31,

2014 Net

  
Patents   $ 228,597     $ 91,193     $ 137,404  
                         
Estimated depreciation expense
2015 $  16,404
2016     16,404
2017     16,404
2018     16,404
2019     16,404