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Patents
6 Months Ended
Jun. 30, 2015
Patents [Abstract]  
Patents


6.

Patents


Included in other assets at June 30, 2015 and December 31, 2014 are capitalized patent costs as follows:

   
 

June 30,
2015

 

December 31,

2014 

 

        

Patent costs

  $ 359,155   $ 332,406

Less accumulated amortization

  (26,898
)  (20,390 )
  $ 332,257   $ 312,016


Amortization expense for the three and six months ended June 30, 2015 and 2014 amounted to $3,328, $6,508, $2,824 and $5,647, respectively.