3149321

Information

• Patent Grant
• 3149321

• References
• Source

• Patent Number

  3,149,321

• Date Filed

  Not available

• Date Issued

  Tuesday, September 15, 1964
  60 years ago

• CPC

  • E05B19/22 - Keys with devices for indicating whether the last operation was locking or unlocking
  • G07C1/20 - Checking timed patrols
  • Y10T70/7446 - Multiple keys
  • Y10T70/7734 - Automatically key set combinations
  • Y10T70/7791 - Keys

• US Classifications

  • 340 - Communications: electrical
  • 070 - Locks