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SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) - USD ($) | 3 Months Ended |
--- | --- | ---
May 31, 2022 | May 31, 2021 | Feb. 28, 2022
Marketable securities including mutual funds, certificates of deposit and US Treasury securities | $ 3,398,931 |  | $ 5,867,990
Accumulated amortization of patents | 195,038 |  | $ 192,490
Annual amortization expense this year | 11,000 |  |
Annual amortization expense year two | 11,000 |  |
Annual amortization expense year three | 11,000 |  |
Annual amortization expense year four | 11,000 |  |
Annual amortization expense year five | 11,000 |  |
Impairment losses | $ 0 | $ 0 |
Domestic Patents |  |  |
Useful life of intangible assets | 17 years |  |
Foreign Patents |  |  |
Useful life of intangible assets | 12 years |  |
Equipment and Furnishings |  |  |
Depreciation methods | straight-line method |  |
Estimated useful lives | three to five years |  |

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