2574605

Information

• Patent Grant
• 2574605

• References
• Source

• Patent Number

  2,574,605

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1951
  73 years ago

• CPC

  • E21B7/26 - Drilling without earth removal
  • E21B4/08 - impact being obtained by gravity only
  • E21B11/005 - Hand operated drilling tools

• US Classifications

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