3885397

Information

• Patent Grant
• 3885397

• References
• Source

• Patent Number

  3,885,397

• Date Filed

  Not available

• Date Issued

  Tuesday, May 27, 1975
  49 years ago

• CPC

  • E21D19/04 - for use in drifting galleries
  • E21D11/40 - Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries

• US Classifications

  • 405 - Hydraulic and earth engineering