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Pat. 10116203 United States, Int. Cl.22 H02M 7/217, G01N 33/00, H01F 38/30, H02M 1/32, H03F 3/21. Transformer including a current induction device having an amplifier circuit : Appl. N 15/414849 : Filed 25.01.2017 : Pub. 30.10.2018 : / Huipeng Li ; Assignee Xi'an Tuofeng Electromechanical Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10116203/en?oq=US10116203.html (дата обращения: ДД.ММ.ГГГГ).