FR1074871A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Method of improving sound recording and reproducing discs
Assignee: Rhone Poulenc SA
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Filing: 1953-02-12
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Granted: 1954-10-11
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Expires: 1973-02-12
Abstract
No abstract record available.
Inventors
- 👤 Paul-Henri Morel
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/68; G11B3/70; C; C09; C09D; C09D5/00; C09D5/23; G11B3/58; G11B3/705; G11B5/00; G11B5/62; G11B5/68
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References Cited (Backward Citations)
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