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6. PATENTS (Tables)
 9 Months Ended
Sep. 30, 2017
Patents Tables  
Patents
   

September 30,

2017 Cost

    

Accumulated

Amortization

    

September 30,

2017 Net

  
Patents   $ 212,426     $ 128,864     $ 83,562  

 

   

December 31, 2016

Cost

    

Accumulated

Amortization

    

December 31, 2016

Net

  
Patents   $ 197,448     $ 101,558     $ 95,890  

 
Estimated depreciation expense
2017   $ 16,438  
2018     16,438  
2019     16,438  
2020     16,438  
2021     16,438