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Pat. 10901026 United States, Int. Cl.22 G01R 31/26, G01R 31/40, H02M 1/42, H02M 1/44, H02M 7/06. Passive harmonic filter power quality monitor and communications device : Appl. N 16/134593 : Filed 18.09.2018 : Pub. 26.01.2021 : / William Kranz, Ian Wallace, Skyler Sandlin, Ashish Bendre, James Pomes ; Assignee Tci LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10901026/en?oq=US10901026.html (дата обращения: ДД.ММ.ГГГГ).