FR573147A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Warning counter with optical signal, to monitor time intervals such as the duration of telephone conversation
Assignee: Fabriques Des Montres Zenith (successeur De Fabriques Des Montres Zenith Georges Favre-Jacot & Compagnie)
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Filing: 1923-11-15
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Granted: 1924-06-18
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Expires: 1943-11-15
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-05 20:13
CPC Classifications
G; G04; G04F; G04F3/00; G04F3/02
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