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5. INTANGIBLE ASSETS, NET
12 Months Ended
Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
INTANGIBLE ASSETS, NET

Intangible assets consisted of the following:

 

    December 31,  
    2019     2018  
             
Patents   $ 176,425     $ 111,160  
Trademarks     57,919       8,910  
      234,344       120,070  
Accumulated amortization     (4,061 )     (1,355 )
    $ 230,283     $ 118,715  

 

Amortization expense was $2,706 and $1,355 for the years ended December 31, 2019 and 2018, respectively.