1145331

Information

• Patent Grant
• 1145331

• References
• Source

• Patent Number

  1,145,331

• Date Filed

  Not available

• Date Issued

  Tuesday, July 6, 1915
  109 years ago

• CPC

  • E21C27/122 - with breaking-down members having a striking action

• US Classifications

  • 299 - Mining or in situ disintegration of hard material