2955809

Information

• Patent Grant
• 2955809

• References
• Source

• Patent Number

  2,955,809

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1960
  64 years ago

• CPC

  • E21C27/46 - by percussed planing means

• US Classifications

  • 299 - Mining or in situ disintegration of hard material