3922529

Information

• Patent Grant
• 3922529

• References
• Source

• Patent Number

  3,922,529

• Date Filed

  Not available

• Date Issued

  Tuesday, November 25, 1975
  49 years ago

• CPC

  • G07F7/10 - together with a coded signal
  • G06K7/065 - for conductive marks
  • G06K19/063 - the carrier being marginally punched or notched
  • G06K19/067 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements
  • G06Q20/347 - Passive cards
  • G07F7/1058 - PIN is checked locally

• US Classifications

  • 235 - Registers