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  • CPC
  • E21D23/0065
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Parent Industries

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

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E21D23/0065driven, or automatically
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Self-advancing roof support for a longwall mining system
    • Patent number 10,767,481
    • Issue date Sep 8, 2020
    • Caterpillar Global Mining Europe GmbH
    • Patrick Clamp
    • E21 - EARTH DRILLING MINING
  • 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

    3754129
    • Patent number 3,754,129
    • Issue date Aug 21, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3531162
    • Patent number 3,531,162
    • Issue date Sep 29, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3500719
    • Patent number 3,500,719
    • Issue date Mar 17, 1970
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    3482407
    • Patent number 3,482,407
    • Issue date Dec 9, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3453935
    • Patent number 3,453,935
    • Issue date Jul 8, 1969
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    3422111
    • Patent number 3,422,111
    • Issue date Jan 14, 1969
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    3405608
    • Patent number 3,405,608
    • Issue date Oct 15, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3399601
    • Patent number 3,399,601
    • Issue date Sep 3, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3392531
    • Patent number 3,392,531
    • Issue date Jul 16, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3378303
    • Patent number 3,378,303
    • Issue date Apr 16, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3357313
    • Patent number 3,357,313
    • Issue date Dec 12, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3348381
    • Patent number 3,348,381
    • Issue date Oct 24, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3246730
    • Patent number 3,246,730
    • Issue date Apr 19, 1966
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3243964
    • Patent number 3,243,964
    • Issue date Apr 5, 1966
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3198083
    • Patent number 3,198,083
    • Issue date Aug 3, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1710887
    • Patent number 1,710,887
    • Issue date Apr 30, 1929
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents