2251406

Information

• Patent Grant
• 2251406

• References
• Source

• Patent Number

  2,251,406

• Date Filed

  Not available

• Date Issued

  Tuesday, August 5, 1941
  83 years ago

• CPC

  • E21C25/28 - Chains or chain guides

• US Classifications

  • 299 - Mining or in situ disintegration of hard material