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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
G08B5/006—Portable traffic signalling devices
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FR391284D1908-06-161908-06-16Appareil pour la distribution intermittente du gaz d'éclairage pour les motifs lumineux, signaux et autres applications
ExpiredFR391284A
(fr)