US Patent 8774420 Headphones with expandable speaker enclosures
Is a
Date Filed
June 29, 2011
0
Date of Patent
July 8, 2014
0
Patent Application Number
13172581
0
Patent Inventor Names
Chris Witham
0
Stephen Belafonte
0
Christopher Combest
0
David Staley
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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