1578544

Information

• Patent Grant
• 1578544

• References
• Source

• Patent Number

  1,578,544

• Date Filed

  Not available

• Date Issued

  Tuesday, March 30, 1926
  98 years ago

• CPC

  • E21C27/06 - with a slewing frame

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 173 - Tool driving or impacting