3812753

Information

• Patent Grant
• 3812753

• References
• Source

• Patent Number

  3,812,753

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1974
  50 years ago

• CPC

  • G06K21/06 - Apparatus or tools adapted for slotting or otherwise marking information-retrieval cards
  • G03B17/24 - with means for separately producing marks on the film
  • Y10S83/917 - Notching
  • Y10T83/76 - With scale or indicator
  • Y10T83/7653 - Having curved cutting edge to make arcuate cut, plural nonaligned intersecting cutting edges, or spaced punches
  • Y10T83/856 - To work-engaging member
  • Y10T83/8749 - By pivotal motion
  • Y10T83/8778 - Ledger blade
  • Y10T83/8818 - Axially progressing cut

• US Classifications

  • 083 - Cutting