3221304

Information

• Patent Grant
• 3221304

• References
• Source

• Patent Number

  3,221,304

• Date Filed

  Not available

• Date Issued

  Tuesday, November 30, 1965
  59 years ago

• CPC

  • G07C9/00039 - by means of a pass-word
  • G07C9/00015 - the pass having a variable code
  • G07C11/00 - Arrangements, systems, or apparatus for checking
  • Y10S194/903 - Check-controlled turnstile

• US Classifications

  • 340 - Communications: electrical
  • 049 - Movable or removable closures
  • 194 - Check-actuated control mechanisms
  • 221 - Article dispensing
  • 235 - Registers
  • 250 - Radiant energy