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Publication of FR843590ApublicationCriticalpatent/FR843590A/fr
G06G1/14—Hand-manipulated computing devices in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale
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FR843590D1937-09-181938-09-17Perfectionnements apportés aux appareils à calculer notamment à ceux pour la navigation aérienne
ExpiredFR843590A
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