2890873

Information

• Patent Grant
• 2890873

• References
• Source

• Patent Number

  2,890,873

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1959
  64 years ago

• CPC

  • E21C25/34 - Chains

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 172 - Earth working