3427811

Information

• Patent Grant
• 3427811

• References
• Source

• Patent Number

  3,427,811

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1969
  55 years ago

• CPC

  • E21D17/00 - Caps for supporting mine roofs
  • E21D11/006 - Lining anchored in the rock

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 052 - Static structures