3504749

Information

• Patent Grant
• 3504749

• References
• Source

• Patent Number

  3,504,749

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1970
  54 years ago

• CPC

  • E21B3/06 - Adaptation of rotary draw works to drive rotary tables
  • E21B15/00 - Derricks Masts; Other supports

• US Classifications

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