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WILLIAMS PRODUCTS Inc
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WILLIAMS PRODUCTS Inc
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Application filed by WILLIAMS PRODUCTS IncfiledCriticalWILLIAMS PRODUCTS Inc
Application grantedgrantedCritical
Publication of FR758753ApublicationCriticalpatent/FR758753A/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
G08B5/36—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
G08B5/38—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
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Physics & Mathematics
(AREA)
Electromagnetism
(AREA)
General Physics & Mathematics
(AREA)
FR758753D1933-07-241933-07-24Dispositif pour la production d'un courant électrique
ExpiredFR758753A
(fr)