3859810

Information

• Patent Grant
• 3859810

• References
• Source

• Patent Number

  3,859,810

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1975
  50 years ago

• CPC

  • E21D11/40 - Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
  • E21D9/10 - Making by using boring or cutting machines
  • E21D11/403 - combined with the head machine

• US Classifications

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