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Pat. 11398821 United States, Int. Cl.22 H03K 17/687, H02M 1/088, H02M 7/5387, H03K 17/693. Power device and electrical appliance : Appl. N 17/475836 : Filed 15.09.2021 : Pub. 26.07.2022 : / Yuxiang Feng ; Assignee Midea Group Co Ltd, Gd Midea Air Conditioning Equipment Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11398821/en?oq=US11398821.html (дата обращения: ДД.ММ.ГГГГ).