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TAVERNIER GRAVET ETS
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TAVERNIER GRAVET ETS
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Publication of FR911290ApublicationCriticalpatent/FR911290A/fr
G06G1/02—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales
G06G1/04—Devices in which computing is effected by adding, subtracting, or comparing lengths of parallel or concentric graduated scales characterised by construction
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FR911290D1945-01-091945-01-09Perfectionnements à la fabrication des règles à calcul
ExpiredFR911290A
(fr)