2758825

Information

• Patent Grant
• 2758825

• References
• Source

• Patent Number

  2,758,825

• Date Filed

  Not available

• Date Issued

  Tuesday, August 14, 1956
  68 years ago

• CPC

  • E21D9/1086 - Drives or transmissions specially adapted therefor
  • E21D9/118 - with independently driven central head

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 175 - Boring or penetrating the earth
  • 198 - Conveyors: power-driven