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Pat. 10768241 United States, Int. Cl.22 G01R 31/40, G01R 19/165, G01R 31/30, G01R 31/327, H02H 1/06, H02H 3/20, H02H 3/247, H02H 9/02, H02J 9/06, H02M 7/06, H03F 1/02, H03F 1/52, H03F 3/187, H03F 3/217, H02H 9/00, H03G 3/34. Power supply circuit and sound equipment : Appl. N 16/123342 : Filed 06.09.2018 : Pub. 08.09.2020 : / Takuya Kataoka, Hitoshi Shima ; Assignee Yamaha Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10768241/en?oq=US10768241.html (дата обращения: ДД.ММ.ГГГГ).