2788200

Information

• Patent Grant
• 2788200

• References
• Source

• Patent Number

  2,788,200

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1957
  67 years ago

• CPC

  • E21C25/68 - Machines for making slits combined with equipment for removing

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 198 - Conveyors: power-driven