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Pat. 10320299 United States, Int. Cl.22 H02M 3/335, B41J 2/435, G03G 15/00, H02M 1/32, H02M 1/00. Power supply apparatus and image forming apparatus controlling a turn-on duty of a switching element for switching a voltage state : Appl. N 15/958344 : Filed 20.04.2018 : Pub. 11.06.2019 : / Yasuhiro Shimura, Hiroki Asano ; Assignee Canon Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10320299/en?oq=US10320299.html (дата обращения: ДД.ММ.ГГГГ).