FR54541E
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to electrical sound reproducing devices such as radio receivers and phonographs
Assignee: Jean-Adolphe Dereux
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Filing: 1946-05-09
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Granted: 1950-05-04
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Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Jean-Adolphe Dereux
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-25 22:22
CPC Classifications
H; H05; H05K; H05K11/00; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/30
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