3885396

Information

• Patent Grant
• 3885396

• References
• Source

• Patent Number

  3,885,396

• Date Filed

  Not available

• Date Issued

  Tuesday, May 27, 1975
  49 years ago

• CPC

  • E21D23/0043 - and supported by two or more rows of struts parallel to the working face
  • E21D23/0047 - without essential shifting devices
  • E21D23/0427 - Shield operating devices; Hinges therefor

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 248 - Supports