FR1007650A
Expired / Lapsed
FR
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Improvements in methods and apparatus for recording, on film or other medium, acoustic or other modulation
Assignee: Marie-Henri-Georges De France
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Filing: 1948-03-17
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Granted: 1952-05-08
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Expires: 1968-03-17
Abstract
No abstract record available.
Inventors
- 👤 Marie-Henri-Georges De France
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-09 06:50
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/12
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