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Document Number
US Patent 5497427
Issued Date
March 5, 1996
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Inventors
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Abstract
A headphone in which a housing containing a drive unit is provided with a window hole formed therein and the window hole is covered with a diaphragm providing acoustic transmissibility therethrough.
Drawing
Headphone - US Patent 5497427 Drawing
Drawing from US Patent 5497427
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Number of Claims:
1
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Owner
Sony Corporation (Tokyo,JP)
Published
March 5, 1996
Application Number
08/351,738
Filed
December 8, 1994
US Classification
381/381  
Int'l Classification
H04R   5/033   (20060101)   H04R   5/00   (20060101)  
Examiner
Assistant Examiner
Attorney/Law Firm
Parent Case
This is a continuation of application Ser. No. 08/122,309 filed Sep. 17, 1993.
Priority Data
Sep 25, 1992 [JP] 4-280635
USPTO Field of Search
381/183   381/187   381/25   381/205   381/188   381/154   379/430   379/431   379/432   379/433   181/128   181/129  
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Description
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