Patent DE708093C successfully refreshed from Google Patents.
DE708093C
Expired / Lapsed
DE
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Siren for generating two different sound frequencies
Assignee: VEM Sachsenwerk GmbH
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Filing: 1937-11-25
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Granted: 1941-07-11
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Expires: 1957-11-25
Abstract
No abstract record available.
Inventors
- 👤 Dipl-Ing Ludwig Hartwagner
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-30 11:08
CPC Classifications
G; G10; G10K; G10K7/00; G10K7/02; G10K7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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