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Pat. 10389268 United States, Int. Cl.22 H02M 7/217, H01L 25/04, H02J 3/36, H02M 7/00, H02M 7/25, H02M 7/483, H02M 7/49, H02M 7/497, H02M 7/537, H02M 7/797. AC-DC power conversion device including helically cascaded unit cells : Appl. N 15/551732 : Filed 06.04.2015 : Pub. 20.08.2019 : / Ryota Onishi, Shigeo Hayashi ; Assignee Mitsubishi Electric Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10389268/en?oq=US10389268.html (дата обращения: ДД.ММ.ГГГГ).