2735667

Information

• Patent Grant
• 2735667

• References
• Source

• Patent Number

  2,735,667

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1956
  68 years ago

• CPC

  • E21C27/26 - by closely adjacent cutter chains acting on the full working face

• US Classifications

  • 299 - Mining or in situ disintegration of hard material