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Publication date
Application filedfiledCritical
Priority to NL76247ApriorityCriticalpatent/NL43349C/xx
Application grantedgrantedCritical
Publication of NL43349CpublicationCriticalpatent/NL43349C/xx
G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K21/00—Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting
G06K21/06—Apparatus or tools adapted for slotting or otherwise marking information-retrieval cards
B—PERFORMING OPERATIONS; TRANSPORTING
B26—HAND CUTTING TOOLS; CUTTING; SEVERING
B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
B26D3/14—Forming notches in marginal portion of work by cutting