FR588096A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Vibrating membrane for telephone devices
Assignee: Roger Lenier
•
Filing: 1924-10-27
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Granted: 1925-04-29
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Expires: 1944-10-27
Abstract
No abstract record available.
Inventors
- 👤 Roger Lenier
- 👤 Albert Mathot
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/04; H04R7/06; H04R7/10
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References Cited (Backward Citations)
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