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Pat. 10998755 United States, Int. Cl.22 H02M 7/537, H02J 3/00, H02J 3/38, H02J 7/00, H02J 7/35, H02J 9/06, H02M 1/32, H02M 1/36, H02M 7/5387, H02H 3/16. Transformerless DC to AC converter using selectively series-connected capacitors and PWM : Appl. N 17/017849 : Filed 11.09.2020 : Pub. 04.05.2021 : / Paul Wilkinson Dent ; Assignee Koolbridge Solar Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10998755/en?oq=US10998755.html (дата обращения: ДД.ММ.ГГГГ).