FR829965A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Processes for magnetic recording and analysis of two or more sound recordings on a single track
Assignee: Leon Thurm
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Filing: 1937-03-13
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Granted: 1938-07-18
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Expires: 1957-03-13
Abstract
No abstract record available.
Inventors
- 👤 Leon Thurm
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
G; G11; G11B; G11B5/00
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