1256721

Information

• Patent Grant
• 1256721

• References
• Source

• Patent Number

  1,256,721

• Date Filed

  Not available

• Date Issued

  Tuesday, February 19, 1918
  107 years ago

• CPC

  • E05B35/12 - requiring the use of two keys
  • Y10T70/47 - Free end only engaged
  • Y10T70/5991 - Tire or rim only
  • Y10T70/675 - Serially operable
  • Y10T70/7458 - Interdependent
  • Y10T70/7774 - False or picking key trapping

• US Classifications

  • 070 - Locks