TREA

characterised by the material

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Industry

  • CPC
  • E21D15/005
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D15/00Props Chocks

Current Industry

E21D15/005characterised by the material
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Internally injected replacement support room-type coal pillar recov...
    • Patent number 11,313,226
    • Issue date Apr 26, 2022
    • China University of Mining and Technology
    • Nan Zhou
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Mine roof support
    • Patent number 10,883,366
    • Issue date Jan 5, 2021
    • CROSSCUT ENTERPRISES LLC
    • David A. Hussey
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine roof support
    • Patent number 9,752,435
    • Issue date Sep 5, 2017
    • SETEVOX (PTY) LTD
    • Johann Adriaan Venter
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mine support and method of forming the same
    • Patent number 6,558,085
    • Issue date May 6, 2003
    • Alethea Rosalind Melanie Hall
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Variable yielding mining crib support column
    • Patent number 5,439,325
    • Issue date Aug 8, 1995
    • Mountainland Support, Inc.
    • Chris D. Kitchen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Collapsible crib mining support column
    • Patent number 5,342,150
    • Issue date Aug 30, 1994
    • Mountainland Support, Inc.
    • Chris D. Kitchen
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Cribbing
    • Patent number 4,565,469
    • Issue date Jan 21, 1986
    • Commercial Shearing, Inc.
    • Nicholas Chlumecky
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method of and apparatus for supporting an overburden
    • Patent number 4,249,837
    • Issue date Feb 10, 1981
    • Heintzman GmbH & Co.
    • Klaus Spies
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2699180
    • Patent number 2,699,180
    • Issue date Jan 11, 1955
    • G05 - CONTROLLING REGULATING
  • Information Patent Grant

    2678247
    • Patent number 2,678,247
    • Issue date May 11, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2474464
    • Patent number 2,474,464
    • Issue date Jun 28, 1949
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents