1330744

Information

• Patent Grant
• 1330744

• References
• Source

• Patent Number

  1,330,744

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1920
  104 years ago

• CPC

  • E21C27/08 - with additional means for cutting the mineral into blocks

• US Classifications

  • 299 - Mining or in situ disintegration of hard material