1958041

Information

• Patent Grant
• 1958041

• References
• Source

• Patent Number

  1,958,041

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1934
  90 years ago

• CPC

  • E21B7/122 - with submersible vertically movable guide
  • Y10S173/01 - Operable submerged in liquid

• US Classifications

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