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G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
G08B5/006—Portable traffic signalling devices
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FR391284D1908-06-161908-06-16
Apparatus for intermittent distribution of lighting gas for light patterns, signals and other applications
ExpiredFR391284A
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