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DOORBELL COMMUNICATION SYSTEMS AND METHODS

14/142,839 | U.S. Patent Application

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Location ELECTRONIC
Filed Dec. 28, 2013
Examiner JARED T WALKER
Class 348
Art Group 2486
Patent No. 8,842,180
Case Type Utility - 348/143000
Status Patented Case
Parent 61/859,070 Expired
Parent 61/872,439 Expired
Parent 14/98,772 Patented
Parent 14/99,888 Patented
Child 29/499,800 Patented
Child 14/492,809 Patented
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Last Updated: 4 years, 3 months ago
Date # Transaction