2153557

Information

• Patent Grant
• 2153557

• References
• Source

• Patent Number

  2,153,557

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1939
  85 years ago

• CPC

  • E21B7/122 - with submersible vertically movable guide
  • E02D29/06 - Constructions, or methods of constructing, in water
  • E02F5/006 - adapted for working ground under water not otherwise provided for
  • E02F9/062 - Advancing equipment
  • E21B15/04 - specially adapted for directional drilling
  • Y10S414/125 - Combined or convertible implements

• US Classifications

  • 037 - Excavating
  • 173 - Tool driving or impacting
  • 175 - Boring or penetrating the earth
  • 414 - Material or article handling