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Pat. 11038437 United States, Int. Cl.22 B23K 9/10, H02M 1/08, H02M 7/48, H02M 7/487, H02M 7/5395, H02J 7/00, H02M 1/00. AC inverter with active neutral balance : Appl. N 15/990009 : Filed 25.05.2018 : Pub. 15.06.2021 : / James Donald Borowski, Travis Orvedahl, Bernard J. Vogel ; Assignee Illinois Tool Works Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11038437/en?oq=US11038437.html (дата обращения: ДД.ММ.ГГГГ).