3911252

Information

• Patent Grant
• 3911252

• References
• Source

• Patent Number

  3,911,252

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1975
  49 years ago

• CPC

  • G07F7/08 - by coded identity card or credit card or other personal identification means
  • G06K7/082 - using inductive or magnetic sensors
  • G06K7/085 - metal detectors
  • G06K7/087 - flux-sensitive
  • G06Q20/347 - Passive cards
  • G06Q20/4033 - Local solvency checks
  • G07F7/10 - together with a coded signal
  • G07F7/1058 - PIN is checked locally

• US Classifications

  • 235 - Registers