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Pat. 11251656 United States, Int. Cl.22 H02J 50/12, H01F 27/02, H01F 27/24, H01F 27/28, H02J 7/02, H02J 50/40, H02M 7/12. Coils for wireless power systems : Appl. N 16/503394 : Filed 03.07.2019 : Pub. 15.02.2022 : / Saining Ren, Ho Fai Leung, Liang Chen ; Assignee Apple Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11251656/en?oq=US11251656.html (дата обращения: ДД.ММ.ГГГГ).