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FR851055A
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FR
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Enhancements to signal-actuated alarm, calling and similar devices
Assignee: Marconis Wireless Telegraph Co Ltd
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Filing: 1939-03-02
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Granted: 1940-01-02
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Expires: 1959-03-02
Abstract
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Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-26 16:53
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/44
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