FR787440A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Device for electro-magnetic sound recording using the poulsen process
Assignee: Alcatel Lucent Deutschland AG
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Filing: 1935-03-15
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Granted: 1935-09-23
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Expires: 1955-03-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64
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