Annual report pursuant to Section 13 and 15(d)

3. PATENTS

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3. PATENTS
12 Months Ended
Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
PATENTS

3. PATENTS 

 

Patents consist of the following: 

 

    March 31, 2018     March 31, 2017  
Patents   $ 211,645     $ 211,645  
Accumulated amortization     (135,813 )     (126,649 )
    $ 75,832     $ 84,996  

  

Amortization expense for patents for the years ended March 31, 2018 and 2017 was $9,164 and $9,165, respectively. 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 3.2 years.