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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
G08B5/221—Local indication of seats occupied in a facility, e.g. in a theatre
Landscapes
Physics & Mathematics
(AREA)
Electromagnetism
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General Physics & Mathematics
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Audible And Visible Signals
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Circuit Arrangement For Electric Light Sources In General
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Non-Portable Lighting Devices Or Systems Thereof
(AREA)
Procede de determination de l'audience de spectacles, tels que des óoeuvres cinematographiques et systeme pour la mise en óoeuvre d'un tel procede.