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G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K5/00—Methods or arrangements for verifying the correctness of markings on a record carrier; Column detection devices
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Perforating, Stamping-Out Or Severing By Means Other Than Cutting
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FR668115D1927-06-161928-06-16Machine pour vérifier les perforations pratiquées dans les cartes perforées pour travaux de statistiques
ExpiredFR668115A
(fr)