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Pat. 10505390 United States, Int. Cl.22 H02J 9/06, G01R 1/30, G01R 19/155, G01R 19/165, G05F 1/652, H02M 7/06, G01R 21/00, G01R 31/42. Power blackout sensing system with a phantom voltage detector including a coupled inductor device : Appl. N 15/912429 : Filed 05.03.2018 : Pub. 10.12.2019 : / Ig Soo Kwon ; Assignee Ig Soo Kwon ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10505390/en?oq=US10505390.html (дата обращения: ДД.ММ.ГГГГ).