2001576

Information

• Patent Grant
• 2001576

• References
• Source

• Patent Number

  2,001,576

• Date Filed

  Not available

• Date Issued

  Tuesday, May 14, 1935
  89 years ago

• CPC

  • E21B7/122 - with submersible vertically movable guide

• US Classifications

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