3459453

Information

• Patent Grant
• 3459453

• References
• Source

• Patent Number

  3,459,453

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1969
  55 years ago

• CPC

  • E21C27/10 - by both slitting and breaking-down

• US Classifications

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