3602139

Information

• Patent Grant
• 3602139

• References
• Source

• Patent Number

  3,602,139

• Date Filed

  Not available

• Date Issued

  Tuesday, August 31, 1971
  53 years ago

• CPC

  • G07F7/08 - by coded identity card or credit card or other personal identification means
  • 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
  • G06Q20/4033 - Local solvency checks

• US Classifications

  • 101 - Printing
  • 235 - Registers
  • 340 - Communications: electrical
  • D18 - Printing and office machinery