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Pat. 9998003 United States, Int. Cl.22 H02J 7/00, H02M 3/155, G05F 3/08, H02J 1/00, H02J 7/02, H02J 50/12, H02M 3/156, H02J 5/00, H02M 1/00. DC-DC converter, power receiving device, and power feeding system : Appl. N 15/331029 : Filed 21.10.2016 : Pub. 12.06.2018 : / Kei Takahashi, Koichiro Kamata, Misako Miwa, Shuhei Maeda ; Assignee Semiconductor Energy Laboratory Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9998003/en?oq=US9998003.html (дата обращения: ДД.ММ.ГГГГ).