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RIDS CHRISTENSEN BOISEN
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RIDS CHRISTENSEN BOISEN
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Publication of FR679662ApublicationCriticalpatent/FR679662A/fr
G08G1/00—Traffic control systems for road vehicles
G08G1/09—Arrangements for giving variable traffic instructions
G08G1/096—Arrangements for giving variable traffic instructions provided with indicators in which a mark progresses showing the time elapsed, e.g. of green phase
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Physics & Mathematics
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General Physics & Mathematics
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FR679662D1929-12-201929-08-01?areil de signalisation pour véhicules applicable aux croisements ?rues
ExpiredFR679662A
(fr)