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Pat. 10250159 United States, Int. Cl.22 H02M 7/483, H02M 1/32, H02M 7/5387, H02M 7/487. Five-level inverter topology with high voltage utilization ratio : Appl. N 15/767721 : Filed 07.11.2016 : Pub. 02.04.2019 : / Hongliang Wang, Yan-Fei Liu ; Assignee Hongliang Wang, Yan-Fei Liu ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10250159/en?oq=US10250159.html (дата обращения: ДД.ММ.ГГГГ).