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Pat. 10819142 United States, Int. Cl.22 H02J 1/00, H02J 9/00, H02J 9/06, H02M 3/335. Power supply circuit and UPS auxiliary power supply system having the same : Appl. N 16/438492 : Filed 12.06.2019 : Pub. 27.10.2020 : / Zhenji Liu, Wen-Kang Hsu, Liang Xiong ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10819142/en?oq=US10819142.html (дата обращения: ДД.ММ.ГГГГ).