FR928854A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to electrodynamic speakers or microphones
Assignee: TRUVOX ENGINEERING Co Ltd
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Filing: 1946-05-07
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Granted: 1947-12-10
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Expires: 1966-05-07
Abstract
No abstract record available.
Inventors
- 👤 Leslie Russel Ward
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-09 09:44
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/02
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Total Claims: 0
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References Cited (Backward Citations)
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