2122686

Information

• Patent Grant
• 2122686

• References
• Source

• Patent Number

  2,122,686

• Date Filed

  Not available

• Date Issued

  Tuesday, July 5, 1938
  86 years ago

• CPC

  • E21B11/02 - Boring rams

• US Classifications

  • 175 - Boring or penetrating the earth
  • 030 - Cutlery
  • 173 - Tool driving or impacting