JPS5388718A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Sealed head phone
Assignee: Panasonic Holdings Corp
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Filing: 1976-12-15
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Granted: —
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Expires: 1996-12-15
Abstract
Abstract PURPOSE: To enable reproduction sound waves with high frequency range without losing an acoustic isolation effect by providing a communicating hole or communicating hole with vibrating membrane attached at a mounting plate for communicating the space at the front surface of the plate with the space within the case at the rear of the plate. COPYRIGHT: (C)1978,JPO&Japio
Inventors
- 👤 Nobuhisa Atoji
- 👤 Shoichi Kusumoto
- 👤 Kazuhide Sato
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-10-31 20:28
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2815; H04R1/2819; H04R1/10; H04R1/1008
Claims Analysis
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References Cited (Backward Citations)
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