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Pat. 10834366 United States, Int. Cl.22 H04N 7/18, G08B 3/10, G08B 15/00, H02M 1/00, H02M 1/08, H02M 7/06, H02M 7/44. Audio/video recording and communication doorbell devices with power control circuitry : Appl. N 16/212274 : Filed 06.12.2018 : Pub. 10.11.2020 : / Daniil Tretiakov, James Steven Skeoch, Robert Tso ; Assignee Amazon Technologies Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10834366/en?oq=US10834366.html (дата обращения: ДД.ММ.ГГГГ).