FR714232A
Expired / Lapsed
FR
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Electromagnetic speaker
Assignee: Eugene-Alexandre Huguenard
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Filing: 1930-06-30
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Granted: 1931-11-10
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Expires: 1950-06-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene-Alexandre Huguenard
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-30 14:40
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/06; H04R9/02; H04R9/04
Claims Analysis
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References Cited (Backward Citations)
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