3797888

Information

• Patent Grant
• 3797888

• References
• Source

• Patent Number

  3,797,888

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1974
  50 years ago

• CPC

  • E21C27/00 - Machines which completely free the mineral from the seam
  • E21C31/04 - imparting both a rotary and reciprocating motion

• US Classifications

  • 299 - Mining or in situ disintegration of hard material