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Pat. 10003184 United States, Int. Cl.22 F25B 49/00, H02H 3/00, H02M 1/12, H02M 3/158, H02M 3/335, H02P 6/04, H02M 1/00, H02M 1/34, H02M 1/42. Backflow preventing device, power conversion device, and refrigeration air-conditioning apparatus : Appl. N 14/780036 : Filed 18.03.2014 : Pub. 19.06.2018 : / Takuya Shimomugi, Koichi Arisawa, Takashi Yamakawa, Keisuke Uemura, Shinsaku Kusube, Kenta Yuasa, Akihiro Tsumura ; Assignee Mitsubishi Electric Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10003184/en?oq=US10003184.html (дата обращения: ДД.ММ.ГГГГ).