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EARPIECE AND ELECTRO-ACOUSTIC TRANSDUCER WITH PROTRUSIONS AND/OR GROOVED PASSAGES

14/588,534 | U.S. Patent Application

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Location ELECTRONIC
Filed Jan. 2, 2015
Examiner KATHERINE A FALEY
Class 381
Art Group 2652
Patent No. 9,516,402
Case Type Utility - 381/380000
Status Patented Case
Child 2014-021014
Last Updated: 4 years, 8 months ago
Date # Transaction