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Pat. 10056780 United States, Int. Cl.22 H02J 7/00, H02J 9/06, H02M 1/12, H02M 3/335, H02M 1/00. Power supply system, uninterruptible power supply system, and power supply method : Appl. N 14/953001 : Filed 26.11.2015 : Pub. 21.08.2018 : / Pei-Qing Hu, Chao Yan, Jian-Hong Zeng ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10056780/en?oq=US10056780.html (дата обращения: ДД.ММ.ГГГГ).