FR921160A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Advanced soundproofing channel
Assignee: LES TRAVAUX SOUTERRAINS
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Filing: 1945-10-31
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Granted: 1947-04-29
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Expires: 1965-10-31
Abstract
No abstract record available.
Inventors
- 👤 Alexandre De Rosen
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-29 21:22
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/161
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References Cited (Backward Citations)
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