FR907651A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements in the construction of speakers and electrodynamic microphones
Assignee: Rene Le Pesant
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Filing: 1944-11-02
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Granted: 1946-03-19
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Expires: 1964-11-02
Abstract
No abstract record available.
Inventors
- 👤 Rene Le Pesant
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/04
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References Cited (Backward Citations)
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