TREA

by making use of the timbering, filling, or other supports

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Industry

  • CPC
  • E21C35/16
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C35/00Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam

Current Industry

E21C35/16by making use of the timbering, filling, or other supports
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydraulic circuit for longwall support
    • Patent number 8,876,218
    • Issue date Nov 4, 2014
    • Tiefenbach Control Systems GmbH
    • Wilfried Weigel
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Shortwall mining machine
    • Patent number 4,196,934
    • Issue date Apr 8, 1980
    • Coal Industry (Patents) Limited
    • Ronald L. J. MacRae
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Longwall installation with carrier for water and electric supply an...
    • Patent number 4,185,874
    • Issue date Jan 29, 1980
    • Gewerkschaft Eisenhutte Westfalia
    • Klaus Beckmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Longwall mining roof support for double deck machines
    • Patent number 4,029,361
    • Issue date Jun 14, 1977
    • Gewerkschaft Eisenhutte Westfalia
    • Klaus Beckmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Hook plough apparatus for longwall mining
    • Patent number 4,013,320
    • Issue date Mar 22, 1977
    • World Oil Mining Ltd.
    • Robert W. Johns
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining machine longwall propulsion means
    • Patent number 3,954,300
    • Issue date May 4, 1976
    • World Oil Mining Ltd.
    • Robert W. Johns
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3649078
    • Patent number 3,649,078
    • Issue date Mar 14, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3640580
    • Patent number 3,640,580
    • Issue date Feb 8, 1972
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3445139
    • Patent number 3,445,139
    • Issue date May 20, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3390915
    • Patent number 3,390,915
    • Issue date Jul 2, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3379476
    • Patent number 3,379,476
    • Issue date Apr 23, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3284138
    • Patent number 3,284,138
    • Issue date Nov 8, 1966
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1645002
    • Patent number 1,645,002
    • Issue date Oct 11, 1927
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    HYDRAULIC CIRCUIT FOR LONGWALL SUPPORT
    • Publication number 20120170981
    • Publication date Jul 5, 2012
    • TIEFENBACH CONTROL SYSTEMS GMGH
    • Wilfried Weigel
    • E21 - EARTH DRILLING MINING