1953327

Information

• Patent Grant
• 1953327

• References
• Source

• Patent Number

  1,953,327

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1934
  91 years ago

• CPC

  • E21C25/24 - with flat jibs only

• US Classifications

  • 299 - Mining or in situ disintegration of hard material