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Pat. 10877097 United States, Int. Cl.22 G01R 31/34, G01R 19/165, H02M 7/5387, H02P 27/06, H04B 10/25. DC monitoring system for variable frequency drives : Appl. N 16/593275 : Filed 04.10.2019 : Pub. 29.12.2020 : / Mark Richter, Robert Pompeani, Arya Bannazadeh-Mahani, Edward Winterberger ; Assignee Power Standard Labs Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10877097/en?oq=US10877097.html (дата обращения: ДД.ММ.ГГГГ).