2561642

Information

• Patent Grant
• 2561642

• References
• Source

• Patent Number

  2,561,642

• Date Filed

  Not available

• Date Issued

  Tuesday, July 24, 1951
  74 years ago

• CPC

  • E21C27/36 - Machine self-propelled along the working face

• US Classifications

  • 299 - Mining or in situ disintegration of hard material