3322214

Information

• Patent Grant
• 3322214

• References
• Source

• Patent Number

  3,322,214

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1967
  57 years ago

• CPC

  • E21B10/46 - characterised by wear resisting parts
  • E21B7/16 - Applying separate balls or pellets by the pressure of the drill, so-called shot-drilling

• US Classifications

  • 175 - Boring or penetrating the earth