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Note 5 - Patents and Trademarks, Net (Tables) | 9 Months Ended
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May 31, 2021
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | May 31, 2021 |  |  | August 31, 2020 |
Patents and trademarks |  | $ | 3,003,862 |  |  | $ | 2,907,852 |
Less accumulated amortization |  |  | (2,257,557 | ) |  |  | (2,105,846 | )
|  | $ | 746,305 |  |  | $ | 802,006 |

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