312012

Information

• Patent Grant
• 312012

• References
• Source

• Patent Number

  312,012

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1885
  140 years ago

• CPC

  • E21B17/046 - with ribs, pins or jaws, and complementary grooves or the like
  • Y10T279/17846 - Single transverse bolt
  • Y10T279/17897 - Tang offset without socket
  • Y10T407/1825 - Handle or holder, per se

• US Classifications

  • 279 - Chucks or sockets
  • 407 - Cutters, for shaping