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Pat. 11463061 United States, Int. Cl.22 H03G 3/30, H02J 7/00, H02J 7/34, H02M 3/28, H02M 3/335, H02M 7/06, H03F 1/02, H03F 1/32, H03F 3/181, H03F 3/183, H03F 3/21, H02M 1/00. Audio power source with improved efficiency : Appl. N 17/172010 : Filed 09.02.2021 : Pub. 04.10.2022 : / David F. Baretich, Simon J. Broadley ; Assignee Biamp Systems LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11463061/en?oq=US11463061.html (дата обращения: ДД.ММ.ГГГГ).