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Association des Ouvriers en Instruments de Precision
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Association des Ouvriers en Instruments de Precision
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Publication of FR1153957ApublicationCriticalpatent/FR1153957A/fr
G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
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Physics & Mathematics
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Electromagnetism
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General Physics & Mathematics
(AREA)
FR1153957D1956-05-311956-05-31Perfectionnements aux appareils rotatifs pour la transmission d'indications à distance
ExpiredFR1153957A
(fr)