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3. PATENTS, NET | 12 Months Ended
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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.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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