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Pat. 10707776 United States, Int. Cl.22 H02M 7/487, H02M 1/00, H02M 7/00. 3-level power conversion circuit including serially-connected switching element and diode : Appl. N 15/340186 : Filed 01.11.2016 : Pub. 07.07.2020 : / Kansuke Fujii, Hiromu Takubo ; Assignee Fuji Electric Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10707776/en?oq=US10707776.html (дата обращения: ДД.ММ.ГГГГ).