Patent US4434653A successfully refreshed from Google Patents.
EP0143383A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Electro-acoustic transducers
Assignee: Sony Corp
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Filing: 1981-10-27
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Granted: —
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Expires: 2001-10-27
Abstract
Abstract An electro-acoustic transducer comprises an outer casing (30) housing an electro-acoustic transducer element (20), the casing (30) being of a size so as in use to fit into the concave portion (B) of an auricle (A) and having a front portion (31) which is larger than the opening of the external auditory meatus and in use does not penetrate thereinto, and at least a portion (31) of the casing (30) comprising a plate member through which many microscopic openings (34) are formed.
Inventors
- 👤 Yoshihiro C/O Patent Division Yokoyama
- 👤 Shingo C/O Patent Division Watanabe
- 👤 Koji C/O Patent Division Nageno
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 02:26
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/10; H04R1/00; H04R1/10; H04R1/1016
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
86 words
An electro-acoustic transducer (10) comprising: an outer casing (30) housing an electro-acoustic transducer element (20), said casing (30) being of a size so as in use to fit into the concave portion (B) of an auricle (A); characterised in that: said casing has a front portion (31) which is larger than the opening of the external auditory meatus and in use does not penetrate thereinto; and at least a portion (31) of said casing (30) comprises a plate member through which many microscopic-openings (34) are formed.
Claim 2
Dependent Claim
86 words
An electro-acoustic transducer (10) comprising: an outer casing (30) housing an electro-acoustic transducer element (20), said casing (30) being of a size so as in use to fit into the concave portion (B) of an auricle (A); characterised in that: said casing has a front portion (31) which is larger than the opening of the external auditory meatus and in use does not penetrate thereinto; and at least a portion (31) of said casing (30) comprises a plate member through which many microscopic-openings (34) are formed.
Claim 3
Dependent Claim
16 words
An electro-acoustic transducer according to claim 1 wherein said microscopic-openings (34) have been formed by electro-forming.
Claim 4
Dependent Claim
16 words
An electro-acoustic transducer according to claim 1 said microscopic openings (34) have been formed by etching.
Claim 5
Dependent Claim
20 words
An electro-acoustic transducer according to claim 1 wherein said plate member forms the front portion (31) of said casing (30).
References Cited (Backward Citations)
No citation records indexed.
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