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Pat. 9866022 United States, Int. Cl.22 H02J 3/32, H02J 3/00, H02J 3/38, H02J 3/46, H02J 7/00, H02M 5/42. Power supply system : Appl. N 14/402255 : Filed 24.05.2012 : Pub. 09.01.2018 : / Kunihiro Nakao, Koji Yakire, Tomoyuki Hirai, Satoshi Nagata ; Assignee Wind Engineering Center Co Ltd, Osaka Gas Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9866022/en?oq=US9866022.html (дата обращения: ДД.ММ.ГГГГ).