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3. PATENTS
12 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
PATENTS

Patents consist of the following:

 

   March 31, 2015   March 31, 2014 
Patents  $157,442   $157,442 
Patents pending and trademarks   54,203    54,203 
Accumulated amortization   (108,320)   (99,156)
   $103,325   $112,489 

 

Amortization expense for patents for the years ended March 31, 2015 and 2014 approximated $9,000. Future amortization expense on patents is estimated to be approximately $9,000 per year based on the estimated life of the patents. The weighted average remaining life of our patents is approximately 5.5 years.