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Note 6 - Patents and Trademarks, Net - Patents and Trademarks, Net (Details) - Patents and Trademarks [Member] - USD ($) | Feb. 28, 2022 | Aug. 31, 2021
--- | --- | ---
Patents and trademarks | $ 3,130,803 | $ 3,018,507
Less accumulated amortization | (2,412,998) | (2,308,935)
Patents and trademarkes, net | $ 717,805 | $ 709,572

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