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Pat. 10651680 United States, Int. Cl.22 H02J 9/06, H02J 1/04, H02J 1/10, H02J 7/34, H02M 1/10, H02M 3/158. Uninterruptible power supply apparatus and method : Appl. N 16/021413 : Filed 28.06.2018 : Pub. 12.05.2020 : / Sewan Heo, Wan Ki Park, Jinsoo Han ; Assignee Electronics and Telecommunications Research Institute Etri ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10651680/en?oq=US10651680.html (дата обращения: ДД.ММ.ГГГГ).