3147959

Information

• Patent Grant
• 3147959

• References
• Source

• Patent Number

  3,147,959

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1964
  60 years ago

• CPC

  • E21C27/124 - with rotatable cutters provided with breaking-down members

• US Classifications

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