2292867

Information

• Patent Grant
• 2292867

• References
• Source

• Patent Number

  2,292,867

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1942
  82 years ago

• CPC

  • E21B7/02 - Portable drilling rigs, truck-or skid-mounted, with their own drive
  • E21B6/02 - the rotation being continuous
  • E21B21/02 - Swivel joints in hose-lines

• US Classifications

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