3855805

Information

• Patent Grant
• 3855805

• References
• Source

• Patent Number

  3,855,805

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1974
  50 years ago

• CPC

  • E21F13/066 - Scraper chain conveyors
  • E21D23/0091 - at the junction with the working face

• US Classifications

  • 405 - Hydraulic and earth engineering
  • 198 - Conveyors: power-driven