1711280

Information

• Patent Grant
• 1711280

• References
• Source

• Patent Number

  1,711,280

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1929
  95 years ago

• CPC

  • E21C25/02 - Machines slitting solely by one or more percussive tools moved through the seam

• US Classifications

  • 299 - Mining or in situ disintegration of hard material