3749446

Information

• Patent Grant
• 3749446

• References
• Source

• Patent Number

  3,749,446

• Date Filed

  Not available

• Date Issued

  Tuesday, July 31, 1973
  51 years ago

• CPC

  • E02D17/06 - Foundation trenches ditches or narrow shafts

• US Classifications

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