FR929623A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Microphone arrangement
Assignee: SIF Societe Independante de Telegraphie Sans Fil
•
Filing: 1946-06-22
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Granted: 1948-01-02
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Expires: 1966-06-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/08
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References Cited (Backward Citations)
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