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3. PATENTS, NET
12 Months Ended
Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
PATENTS, NET

3. PATENTS, NET

 

Patents, net consist of the following:

 

    March 31, 2020     March 31, 2019  
Patents   $ 211,645     $ 211,645  
Accumulated amortization     (154,141 )     (144,977 )
    $ 57,504     $ 66,668  

 

Amortization expense for capitalized patents for each of the fiscal years ended March 31, 2020 and 2019 was $9,164. As several patents expired during the fiscal year ended March 31, 2020 and only one capitalized patent remains to be amortized, future amortization expense on patents is estimated to be approximately $550 per year based on the estimated life of the patent. The weighted average remaining life of our remaining capitalized patent is approximately 6 years.