1765513

Information

• Patent Grant
• 1765513

• References
• Source

• Patent Number

  1,765,513

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1930
  94 years ago

• CPC

  • E21B25/12 - of the sliding wedge type

• US Classifications

  • 175 - Boring or penetrating the earth
  • 294 - Handling: hand and hoist-line implements