1422477

Information

• Patent Grant
• 1422477

• References
• Source

• Patent Number

  1,422,477

• Date Filed

  Not available

• Date Issued

  Tuesday, July 11, 1922
  102 years ago

• CPC

  • G07C1/20 - Checking timed patrols
  • Y10T70/8054 - With recorder

• US Classifications

  • 070 - Locks
  • 346 - Recorders