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Pat. 11152871 United States, Int. Cl.22 G05F 1/40, G05F 1/575, H02M 1/44, H02M 3/156, H02M 7/04. Alternating current (AC) voltage regulator and method of operating the same : Appl. N 16/899184 : Filed 11.06.2020 : Pub. 19.10.2021 : / Kenneth Edward Pagenkopf ; Assignee Hubbell Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11152871/en?oq=US11152871.html (дата обращения: ДД.ММ.ГГГГ).