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Patents
3 Months Ended
Mar. 31, 2015
Patents [Abstract]  
Patents

6. Patents

Included in other assets at March 31, 2015 and December 31, 2014 are capitalized patent costs as follows:


   
 

March 31,
2015

 

December 31,

2014

       

Patent costs

  $ 345,695   $ 332,406

Less accumulated amortization

    (23,593 )   (20,390 )
    $ 322,102   $ 312,016


Amortization expense for the three months ended March 31, 2015 and 2014 amounted to $3,180 and $2,824, respectively.