3409329

Information

• Patent Grant
• 3409329

• References
• Source

• Patent Number

  3,409,329

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1968
  56 years ago

• CPC

  • E21C31/04 - imparting both a rotary and reciprocating motion
  • E21C27/02 - solely by slitting
  • E21C27/18 - by both slitting and planing

• US Classifications

  • 299 - Mining or in situ disintegration of hard material