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7. PATENTS (Tables)
12 Months Ended
Sep. 30, 2019
Finite-Lived Intangible Assets, Net [Abstract]  
Schedule of Patents
    2019     2018  
Patents   $ 841,397     $ 742,698  
Accumulated amortization     (529,811 )     (484,605 )
                 
Patents, net   $ 311,586     $ 258,093  
Schedule of total estimated future amortization
Years ending September 30,      
2020     51,000  
2021     48,000  
2022     44,000  
2023     33,000  
2024     26,000  
Thereafter     110,000  
    $ 312,000