2915291

Information

• Patent Grant
• 2915291

• References
• Source

• Patent Number

  2,915,291

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1959
  65 years ago

• CPC

  • E21B10/16 - characterised by tooth form or arrangement
  • E21B10/083 - with longitudinal axis

• US Classifications

  • 175 - Boring or penetrating the earth