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Pat. 10749430 United States, Int. Cl.22 H02M 3/155, H02J 7/00, H02J 7/02, H02M 3/02, H02M 7/42. Power transmission apparatus and control method therefor, and power supply system : Appl. N 15/701593 : Filed 12.09.2017 : Pub. 18.08.2020 : / Zhendong Gao, Guoliang Mu, Fangshi Liu ; Assignee Positec Power Tools Suzhou Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10749430/en?oq=US10749430.html (дата обращения: ДД.ММ.ГГГГ).