3379264

Information

• Patent Grant
• 3379264

• References
• Source

• Patent Number

  3,379,264

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1968
  56 years ago

• CPC

  • E21D1/06 - with shaft-boring cutters
  • E21D9/112 - by means of one single rotary head or of concentric rotary heads

• US Classifications

  • 175 - Boring or penetrating the earth