3134447

Information

• Patent Grant
• 3134447

• References
• Source

• Patent Number

  3,134,447

• Date Filed

  Not available

• Date Issued

  Tuesday, May 26, 1964
  60 years ago

• CPC

  • E21B10/52 - with chisel or button type inserts
  • E21B10/06 - Roller core bits
  • E21B10/16 - characterised by tooth form or arrangement

• US Classifications

  • 175 - Boring or penetrating the earth