TREA

Trailing plates; Coal face or goaf side sprags

Follow

Industry

  • CPC
  • E21D23/0454
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/0454Trailing plates; Coal face or goaf side sprags
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Longwall optimization control
    • Patent number 10,208,592
    • Issue date Feb 19, 2019
    • Joy Global Underground Mining LLC
    • Gareth Rimmington
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Coal caving cycle
    • Patent number 9,068,452
    • Issue date Jun 30, 2015
    • Yancoal Technology Development PTY Ltd
    • Maohu Matthew Wang
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Movable trestle
    • Patent number 4,747,729
    • Issue date May 31, 1988
    • Voest-Alpine Aktiengesellschaft
    • Ernst Urschitz
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining equipment, mainly for extraction of heavy beds
    • Patent number 4,547,098
    • Issue date Oct 15, 1985
    • Kozponti Banyaszati Fejlesztesi Intezet
    • Matyas Martinko
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof supports
    • Patent number 4,518,284
    • Issue date May 21, 1985
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Self-advancing support and control means therefor
    • Patent number 4,491,441
    • Issue date Jan 1, 1985
    • Dowty Mining Equipment Limited
    • Reginald E. Freeman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Gob canopy for a mine roof support
    • Patent number 4,480,946
    • Issue date Nov 6, 1984
    • Jay H. Kelley
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mineral mining installations
    • Patent number 4,415,295
    • Issue date Nov 15, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Georg Werner
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining equipment, mainly for extraction of heavy beds
    • Patent number 4,386,878
    • Issue date Jun 7, 1983
    • Kozponti Banyaszati Fejlesztesi Intezet
    • Matvas Martinko
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining equipment
    • Patent number 4,310,268
    • Issue date Jan 12, 1982
    • Fletcher Sutcliffe Wild Limited
    • Lewis R. Bower
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Cowl arrangements for mining machines
    • Patent number 4,229,043
    • Issue date Oct 21, 1980
    • Coal Industry (Patents) Limited
    • Roy L. Bell
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Walking mine support
    • Patent number 4,183,700
    • Issue date Jan 15, 1980
    • Bochumer Eisenhutte Heintzmann GmbH
    • Gerhard von Klinggraff
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Breast roof support system for longwall mining
    • Patent number 4,094,153
    • Issue date Jun 13, 1978
    • Bochumer Eisenhutte Heintzmann GmbH & Co.
    • Gunter Blumenthal
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support equipment
    • Patent number 3,943,723
    • Issue date Mar 16, 1976
    • Coal Industry (Patents) Limited
    • Frank Evans
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3874178
    • Patent number 3,874,178
    • Issue date Apr 1, 1975
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3800546
    • Patent number 3,800,546
    • Issue date Apr 2, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3618325
    • Patent number 3,618,325
    • Issue date Nov 9, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3564857
    • Patent number 3,564,857
    • Issue date Feb 23, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3474627
    • Patent number 3,474,627
    • Issue date Oct 28, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2714505
    • Patent number 2,714,505
    • Issue date Aug 2, 1955
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    COAL CAVING CYCLE
    • Publication number 20130187436
    • Publication date Jul 25, 2013
    • Maohu Matthew Wang
    • E21 - EARTH DRILLING MINING