424412

Information

• Patent Grant
• 424412

• References
• Source

• Patent Number

  424,412

• Date Filed

  Not available

• Date Issued

  Tuesday, March 25, 1890
  134 years ago

• CPC

  • E05B35/06 - for screw keys
  • Y10T70/787 - Irregular nonplanar or undulated

• US Classifications

  • 070 - Locks