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Pat. 11309727 United States, Int. Cl.22 H02M 3/07, G01D 4/02, G06F 1/14, G06F 1/30, H02J 7/00, H02J 7/34, H02M 7/02. Utility meter with solar-powered real-time clock : Appl. N 16/830961 : Filed 26.03.2020 : Pub. 19.04.2022 : / Anibal Diego Ramirez ; Assignee Landis and Gyr Innovations Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11309727/en?oq=US11309727.html (дата обращения: ДД.ММ.ГГГГ).