3477762

Information

• Patent Grant
• 3477762

• References
• Source

• Patent Number

  3,477,762

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1969
  55 years ago

• CPC

  • E21D9/117 - mounted for orientating or sideways shifting relative to the frame

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth