US Patent 9139421 Top port surface mount MEMS microphone
Patent 9139421 was granted and assigned to Knowles (company) on September, 2015 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
January 7, 2014
Date of Patent
September 22, 2015
Patent Applicant
Patent Application Number
14149506
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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