Annual report pursuant to Section 13 and 15(d)

3. PATENTS

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3. PATENTS
12 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
PATENTS

Patents consist of the following:

 

    March 31, 2017     March 31, 2016  
Patents   $ 211,645     $ 211,645  
Accumulated amortization     (126,649 )     (117,484 )
    $ 84,996     $ 94,161  

 

Amortization expense for patents for the years ended March 31, 2017 and 2016 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 4.0 years.