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Pat. 11509163 United States, Int. Cl.22 H02J 7/35, H02H 3/16, H02J 3/00, H02J 3/38, H02J 7/00, H02J 9/06, H02M 1/32, H02M 1/36, H02M 7/537, H02M 7/5387. Multi-level DC to AC inverter : Appl. N 16/532163 : Filed 05.08.2019 : Pub. 22.11.2022 : / Paul Wilkinson Dent ; Assignee Koolbridge Solar Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11509163/en?oq=US11509163.html (дата обращения: ДД.ММ.ГГГГ).