3773387

Information

• Patent Grant
• 3773387

• References
• Source

• Patent Number

  3,773,387

• Date Filed

  Not available

• Date Issued

  Tuesday, November 20, 1973
  51 years ago

• CPC

  • E21D9/115 - with cutting tools mounted pivotably or slidable on the head
  • E21D9/1086 - Drives or transmissions specially adapted therefor

• US Classifications

  • 299 - Mining or in situ disintegration of hard material