2111405

Information

• Patent Grant
• 2111405

• References
• Source

• Patent Number

  2,111,405

• Date Filed

  Not available

• Date Issued

  Tuesday, March 15, 1938
  86 years ago

• CPC

  • E21D11/40 - Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
  • E21D9/0879 - the shield being provided with devices for lining the tunnel

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 414 - Material or article handling