2561657

Information

• Patent Grant
• 2561657

• References
• Source

• Patent Number

  2,561,657

• Date Filed

  Not available

• Date Issued

  Tuesday, July 24, 1951
  73 years ago

• CPC

  • E21C25/30 - Chain guides

• US Classifications

  • 299 - Mining or in situ disintegration of hard material