3385379

Information

• Patent Grant
• 3385379

• References
• Source

• Patent Number

  3,385,379

• Date Filed

  Not available

• Date Issued

  Tuesday, May 28, 1968
  56 years ago

• CPC

  • E21B6/06 - the rotation being intermittent, e.g.obtained by ratchet device

• US Classifications

  • 173 - Tool driving or impacting