US Patent 8774420 Headphones with expandable speaker enclosures
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Patent Inventor Names
Chris Witham0
Christopher Combest0
David Staley0
Stephen Belafonte0
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US Patent 08774420 Headphones with expandable speaker enclosures US Patent 8774420 Headphones with expandable speaker enclosures
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Patent Number
087744200
Patent Number
87744200
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Official Website
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Patent Jurisdiction
Patent Number
087744200
Date of Patent
July 8, 2014
0Patent Application Number
131725810
Date Filed
June 29, 2011
0Official Website
Patent Primary Examiner
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US Patent 08774420 Headphones with expandable speaker enclosures
Infobox
Is a
Patent jurisdiction
Patent number
08774420
Date of patent
July 8, 2014
Patent application number
13172581
Date Filed
June 29, 2011
Patent primary examiner
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