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Satas
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Publication of FR800296ApublicationCriticalpatent/FR800296A/fr
G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B5/00—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied
G08B5/22—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission
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Physics & Mathematics
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General Physics & Mathematics
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FR800296D1935-04-091935-04-09émetteur et récepteur d'impulsions pour transmissions à distance
ExpiredFR800296A
(fr)