3841417

Information

• Patent Grant
• 3841417

• References
• Source

• Patent Number

  3,841,417

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1974
  50 years ago

• CPC

  • E21B11/005 - Hand operated drilling tools
  • B23B47/28 - Drill jigs for workpieces
  • E21B19/24 - Guiding or centralising devices for drilling rods or pipes
  • B23B2247/04 - Jigs using one or more holes as datums for drilling further holes

• US Classifications

  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth