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Pat. 10032555 United States, Int. Cl.22 H01F 27/42, G05F 1/13, H02M 1/08, H02M 5/04, H02M 1/00. Current regulator with feedback circuit for AC coupling : Appl. N 15/036266 : Filed 11.03.2014 : Pub. 24.07.2018 : / Isaac Ng, Abdul Qadir Shabbir ; Assignee Halliburton Energy Services Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10032555/en?oq=US10032555.html (дата обращения: ДД.ММ.ГГГГ).