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Publication of FR949502ApublicationCriticalpatent/FR949502A/fr
G06G1/0005—Hand-manipulated computing devices characterised by a specific application
G06G1/0068—Hand-manipulated computing devices characterised by a specific application for conversion from one unit system to another, e.g. from British to metric
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FR949502D1947-07-121947-07-12Dispositif pour la conversion d'unités
ExpiredFR949502A
(fr)