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Pat. 10522306 United States, Int. Cl.22 H01H 9/56, H01H 33/59, H02M 3/335, H02M 1/00. System and method of causing a zero-current crossing in an electrical circuit : Appl. N 15/606599 : Filed 26.05.2017 : Pub. 31.12.2019 : / Leonard W. White, Subhashish Bhattacharya ; Assignee North Carolina State University ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10522306/en?oq=US10522306.html (дата обращения: ДД.ММ.ГГГГ).