FR706197A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to devices for recording and reproducing sounds
Assignee: FINANC FRANCAISE ET COLONIALE
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Filing: 1930-02-12
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Granted: 1931-06-19
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Expires: 1950-02-12
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 21:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/26
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