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Pat. 9882509 United States, Int. Cl.22 H02M 7/533, H02J 50/12, H02M 1/00, H02M 7/537, H02M 7/5383, H02M 7/48. Resonant type high frequency power supply device and switching circuit for resonant type high frequency power supply device : Appl. N 15/028650 : Filed 31.10.2013 : Pub. 30.01.2018 : / Yoshiyuki Akuzawa, Kiyohide Sakai, Toshihiro Ezoe, Yuki Ito ; Assignee Mitsubishi Electric Engineering Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9882509/en?oq=US9882509.html (дата обращения: ДД.ММ.ГГГГ).