2621026

Information

• Patent Grant
• 2621026

• References
• Source

• Patent Number

  2,621,026

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1952
  72 years ago

• CPC

  • E21B10/06 - Roller core bits

• US Classifications

  • 175 - Boring or penetrating the earth