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INTANGIBLE ASSETS
6 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]  
INTANGIBLE AND OTHER ASSETS

5.    INTANGIBLE ASSETS

 

Intangible assets consist of the following as of March 31, 2019 and September 30, 2018:

 

   March 31, 2019  September 30, 2018
Patents  $71,962   $71,962
Websites   16,482    16,482
Brand and Client lists   5,722,024    —  
Trademarks   5,928    5,928
Engineering trade secrets   4,370,269    4,020,269
Software   —      26,990
Less: accumulated amortization   (1,536,129)   (927,164)
Intangible assets, net  $8,650,536   $3,214,467

 

Amortization expense for the six months ended March 31, 2019 and 2018 was $635,955 and $395,919, respectively.