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Intangible assets, net (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Intangible assets, net    
Patents $ 39,369,997 $ 39,371,317
Less: accumulated amortization (6,563,259) (2,042,126)
Patents, net $ 32,806,738 $ 37,329,191