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Pat. 9985697 United States, Int. Cl.22 H04B 5/00, H02M 1/00, H02M 1/36, H02M 3/335. Circuit device, electronic device, and drive method for resonant circuit : Appl. N 15/255620 : Filed 02.09.2016 : Pub. 29.05.2018 : / Norikazu Tsukahara ; Assignee Seiko Epson Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9985697/en?oq=US9985697.html (дата обращения: ДД.ММ.ГГГГ).