1216859

Information

• Patent Grant
• 1216859

• References
• Source

• Patent Number

  1,216,859

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1917
  107 years ago

• CPC

  • E05B27/0053 - for use with more than one key
  • Y10T70/7463 - Master- and change-key
  • Y10T70/7718 - Intermediate

• US Classifications

  • 070 - Locks