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Pat. 11489440 United States, Int. Cl.22 H02M 1/42, H02M 1/32, H02M 7/219, H02M 1/00. Power factor correction circuit : Appl. N 17/146471 : Filed 11.01.2021 : Pub. 01.11.2022 : / Haibin Song, Jian Zhou, Qi Fu, Daofei Xu, Jinfa Zhang ; Assignee Delta Electronics Shanghai Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11489440/en?oq=US11489440.html (дата обращения: ДД.ММ.ГГГГ).