820849

Information

• Patent Grant
• 820849

• References
• Source

• Patent Number

  820,849

• Date Filed

  Not available

• Date Issued

  Tuesday, May 15, 1906
  119 years ago

• CPC

  • E21C25/24 - with flat jibs only
  • B28D1/088 - Sawing in situ

• US Classifications

  • 299 - Mining or in situ disintegration of hard material