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Pat. 11218020 United States, Int. Cl.22 H02J 9/00, H02M 3/07. Device for detecting the load state of driving power supply : Appl. N 16/690971 : Filed 21.11.2019 : Pub. 04.01.2022 : / Pengyuan Zhao, Xiaobo You ; Assignee Ningbo Self Electronics Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11218020/en?oq=US11218020.html (дата обращения: ДД.ММ.ГГГГ).