1226412

Information

• Patent Grant
• 1226412

• References
• Source

• Patent Number

  1,226,412

• Date Filed

  Not available

• Date Issued

  Tuesday, May 15, 1917
  107 years ago

• CPC

  • E21C27/10 - by both slitting and breaking-down

• US Classifications

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