Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Compagnie des Forges et Acieries de la Marine et dHomecourt
Original Assignee
Compagnie des Forges et Acieries de la Marine et dHomecourt
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Filing date
Publication date
Application filed by Compagnie des Forges et Acieries de la Marine et dHomecourtfiledCriticalCompagnie des Forges et Acieries de la Marine et dHomecourt
Application grantedgrantedCritical
Publication of FR615291ApublicationCriticalpatent/FR615291A/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
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
General Physics & Mathematics
(AREA)
FR615291D1925-09-161925-09-16Appareil électrique de transmission de mouvement à distance
ExpiredFR615291A
(fr)