G06K 21/00 Information retrieval from punched cards designed for manual use or handling by machine (G06K19/00 takes precedence; detection or correction of errors by rescanning patterns G06V10/98; checking correct operation of card-conveying mechanisms G06K13/06); Apparatus for handling such cards, e.g. marking or correcting
Introduced: September 1968
Title
Titles differ between systems:
IPC: Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting
CPC: Information retrieval from punched cards designed for manual use or handling by machine (G06K19/00 takes precedence; detection or correction of errors by rescanning patterns G06V10/98; checking correct operation of card-conveying mechanisms G06K13/06); Apparatus for handling such cards, e.g. marking or correcting
Full Title
Full titles differ between systems:
Information retrieval from punched cards designed for manual use or handling by machine; Apparatus for handling such cards, e.g. marking or correcting
Information retrieval from punched cards designed for manual use or handling by machine (G06K19/00 takes precedence; detection or correction of errors by rescanning patterns G06V10/98; checking correct operation of card-conveying mechanisms G06K13/06); Apparatus for handling such cards, e.g. marking or correcting
Of 5 combined children, 4 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- G06K 21/02 in which coincidence of markings is sensed mechanically, e.g. by needle IPC+CPC Available in IPC and CPC
- G06K 21/04 in which coincidence of markings is sensed optically, e.g. peek-a-boo system IPC+CPC Available in IPC and CPC
- G06K 21/06 Apparatus or tools adapted for slotting or otherwise marking information-retrieval cards IPC+CPC Available in IPC and CPC
- G06K 21/08 Apparatus or tools for correcting punching or slotting errors since 1974 +1 CPC IPC+CPC Available in IPC and CPC