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DOORBELL COMMUNICATION SYSTEMS AND METHODS

16/915,977 | U.S. Patent Application

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Location ELECTRONIC
Filed June 29, 2020
Examiner JOSEPH W BECKER
Class 340
Art Group 2483
Patent No. 11,575,537
Case Type Utility - 340/005500
Status Patented Case
Parent 15/719,543 Abandoned
Parent 15/615,818 Patented
Parent 15/292,019 Abandoned
Parent 14/861,613 Patented
Parent 14/728,975 Patented
Parent 62/221,489 Expired
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Last Updated: 2 weeks, 3 days ago
Date # Transaction