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Note 6 - Patents and Trademarks, Net (Tables)
3 Months Ended
Nov. 30, 2021
Patents and Trademarks [Member]  
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

November 30, 2021

  

August 31, 2021

 

Patents and trademarks

 $3,070,704  $3,018,507 

Less accumulated amortization

  (2,360,829)  (2,308,935)
  $709,875  $709,572