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Patents
6 Months Ended
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

6. Patents

 

Included in other assets at June 30, 2016 and December 31, 2015 are capitalized patent costs as follows:

 

               
   

June 30,

2016

 

December 31,

2015

 
     (Unaudited)      
Patent costs   $ 472,584   $ 372,411  
Less accumulated amortization     (40,764 )   (33,512 )
    $ 431,820   $ 338,899  

 

Amortization expense for the three and six months ended June 30, 2016 and 2015 amounted to $3,394, $7,252, and $3,328 and $6,508, respectively.