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Pat. 11120953 United States, Int. Cl.22 H01H 1/00, G01R 31/327, G01R 31/40, H01H 9/54, H01H 50/04, H02H 1/00, H02M 3/156, H03K 3/313, H03K 17/60, H01H 1/50, H01H 47/00, H01H 71/04, H02H 3/06, H02H 3/087, H02H 7/26, H02H 9/02, H02H 9/08, H03K 3/45. Power contact end-of-life (EoL) predictor apparatus and method : Appl. N 16/909088 : Filed 23.06.2020 : Pub. 14.09.2021 : / Reinhold Henke, Robert Thorbus ; Assignee Arc Suppression Technologies LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11120953/en?oq=US11120953.html (дата обращения: ДД.ММ.ГГГГ).