1271199

Information

• Patent Grant
• 1271199

• References
• Source

• Patent Number

  1,271,199

• Date Filed

  Not available

• Date Issued

  Tuesday, July 2, 1918
  106 years ago

• CPC

  • E21C27/10 - by both slitting and breaking-down

• US Classifications

  • 299 - Mining or in situ disintegration of hard material