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FR36705E
Expired / Lapsed
FR
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Improvements to sound-producing devices
Assignee: Compagnie Francaise Thomson Houston SA
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Filing: 1928-12-01
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Granted: 1930-09-03
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Expires: 1948-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-05 13:36
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R1/00; H04R1/20; H04R1/22; H04R1/24; H04R1/32; H04R1/34; H04R1/345; H04R11/00; H04R11/02; H04R7/00; H04R7/02; H04R7/12; H04R7/122; H04R7/14; H04R7/16; H04R7/18; H04R7/20; H04R9/04; H04R9/041; H04R9/042; H04R9/045; H04R9/06; H04R9/063
Claims Analysis
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References Cited (Backward Citations)
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