3858940

Information

• Patent Grant
• 3858940

• References
• Source

• Patent Number

  3,858,940

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1975
  50 years ago

• CPC

  • E21C29/08 - Anchoring arrangements

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 405 - Hydraulic and earth engineering