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Individual
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Individual
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Application filed by IndividualfiledCriticalIndividual
Priority to FR7536379ApriorityCriticalpatent/FR2333307A1/fr
Publication of FR2333307A1publicationCriticalpatent/FR2333307A1/fr
Application grantedgrantedCritical
Publication of FR2333307B3publicationCriticalpatent/FR2333307B3/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
G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
General Physics & Mathematics
(AREA)
Audible And Visible Signals
(AREA)
FR7536379A1975-11-271975-11-27Installation d'avertissement, notamment pour sonnerie de porte
GrantedFR2333307A1
(fr)
