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Pat. 11223233 United States, Int. Cl.22 H01F 27/42, B60L 53/122, H01F 37/00, H01F 38/00, H02J 7/02, H02J 7/04, H02J 50/12, H02M 7/48, H02M 7/483. Multilevel converter : Appl. N 15/120385 : Filed 23.02.2015 : Pub. 11.01.2022 : / Udaya Kumara Madawala, Duleep Jayanath Thirmawithana, Hamid Reza Rahnamaee ; Assignee Auckland Uniservices Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11223233/en?oq=US11223233.html (дата обращения: ДД.ММ.ГГГГ).