2154732

Information

• Patent Grant
• 2154732

• References
• Source

• Patent Number

  2,154,732

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1939
  85 years ago

• CPC

  • E21B11/02 - Boring rams

• US Classifications

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