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US Patent D921511 Doorbell

Overview Structured Data Issues Contributors

Is a

Patent

Patent attributes

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

D921511

Patent Inventor Names

Jun Li0

Date of Patent

June 8, 2021

Patent Application Number

29719649

Date Filed

January 7, 2020

Patent Citations Received

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US Patent D1024822 Audio/video doorbell and door viewer

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US Patent D1048912 Smart battery video doorbell

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US Patent 12081903 Audio/video device with viewer

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US Patent D1025803 Audio/video doorbell and door viewer

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US Patent D1010485 Contactless sensor unit for automatic door

Patent Primary Examiner

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George D. Kirschbaum

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