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3. PATENTS (Tables) | 12 Months Ended
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Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of patents | Patents, net consist of the following:
|  | March 31, 2021 |  |  | March 31, 2020 |
Issued patents |  | $ | 157,442 |  |  | $ | 157,442 |
Accumulated amortization |  |  | (154,691 | ) |  |  | (154,141 | )
Issued patents, net of accumulated amortization |  |  | 2,751 |  |  |  | 3,301 |
Patents pending |  |  | 54,203 |  |  |  | 54,203 |
Patents, net |  | $ | 56,954 |  |  | $ | 57,504 |

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