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Pat. 10989760 United States, Int. Cl.22 G01R 31/382, G01R 31/389, G01R 31/392, G01R 31/396, H01M 10/44, H01M 10/48, H02M 7/44. System and method for impedance testing DC power sources : Appl. N 16/233303 : Filed 27.12.2018 : Pub. 27.04.2021 : / Arne Ballantine, Ranganathan Gurunathan, Anilkumar Vishnuvarjula, Chockkalingam Karuppaiah ; Assignee Bloom Energy Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10989760/en?oq=US10989760.html (дата обращения: ДД.ММ.ГГГГ).