FR858087A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Electro-dynamic apparatus intended to transform sounds and comprising an oscillating coil placed in a magnetic field
Assignee: Julio Alfredo Ricart-Vidal
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Filing: 1939-04-19
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Granted: 1940-11-16
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Expires: 1959-04-19
Abstract
No abstract record available.
Inventors
- 👤 Julio Alfredo Ricart-Vidal
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-04 18:26
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R7/00; H04R7/02; H04R7/12; H04R9/10
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