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Pat. 11393302 United States, Int. Cl.22 G08B 3/10, G08B 5/36, H02M 1/12, H02M 5/06, H02M 5/257. Electronic system sharing power with doorbell and power-supply method thereof : Appl. N 17/034771 : Filed 28.09.2020 : Pub. 19.07.2022 : / Chia-Liang Wei ; Assignee Chicony Electronics Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11393302/en?oq=US11393302.html (дата обращения: ДД.ММ.ГГГГ).