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Pat. 9998033 United States, Int. Cl.22 H02M 7/5395, H02J 3/38, H02M 7/48, H02M 7/5387, H02M 7/72, G05F 1/67, H02J 3/32, H02J 9/06, H02M 1/00. Stacked voltage source inverter with separate DC sources : Appl. N 14/668962 : Filed 25.03.2015 : Pub. 12.06.2018 : / Milan Ilic, Mika Nuotio ; Assignee Empower Micro Systems Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9998033/en?oq=US9998033.html (дата обращения: ДД.ММ.ГГГГ).