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DOORBELL COMMUNICATION SYSTEMS AND METHODS

17/531,505 | U.S. Patent Application

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Location ELECTRONIC
Filed Nov. 19, 2021
Examiner ROWINA J CATTUNGAL
Class 348
Art Group 2425
Patent No. 11,641,452
Case Type Utility - 348/156000
Status Patented Case
Parent 16/883,313 Patented
Parent 15/811,829 Patented
Parent 15/455,360 Patented
Parent 15/341,140 Patented
Parent 62/400,611 Expired
Parent 14/861,613 Patented
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Last Updated: 3 months, 3 weeks ago
Date # Transaction