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Pat. 10559974 United States, Int. Cl.22 H02J 1/10, H02J 3/38, H02J 4/00, H02J 7/00, H02J 9/06, H02M 3/335, H05B 44/00. Constant power output from emergency battery packs : Appl. N 15/492405 : Filed 20.04.2017 : Pub. 11.02.2020 : / Kevin Odith Porter, Daniel Leland Bragg ; Assignee Eaton Intelligent Power Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10559974/en?oq=US10559974.html (дата обращения: ДД.ММ.ГГГГ).