3387893

Information

• Patent Grant
• 3387893

• References
• Source

• Patent Number

  3,387,893

• Date Filed

  Not available

• Date Issued

  Tuesday, June 11, 1968
  56 years ago

• CPC

  • E21D9/115 - with cutting tools mounted pivotably or slidable on the head

• US Classifications

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