3589714

Information

• Patent Grant
• 3589714

• References
• Source

• Patent Number

  3,589,714

• Date Filed

  Not available

• Date Issued

  Tuesday, June 29, 1971
  53 years ago

• CPC

  • F15C1/001 - for punched-card machines ; for typewriters ; for keyboards; for conveying cards or tape; for conveying through tubes ; for computers ; for dc-ac transducers for information processing ; for signal transmission
  • G06K13/067 - Checking presence, absence, correct position, or moving status of cards

• US Classifications

  • 271 - Sheet feeding or delivering
  • 073 - Measuring and testing