DE744696C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Touch microphone with carbon chamber
Assignee: HANS PANZERBIETER BERLIN HASEL
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Filing: 1941-10-18
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Granted: 1955-01-17
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Expires: 1961-10-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
H; H04; H04R; H04R21/00; H04R21/02; H04R21/021
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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