TREA

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  • CPC
  • E21D11/20
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

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E21D11/20Special cross- sections
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Adjustable lattice girder
    • Patent number 11,242,750
    • Issue date Feb 8, 2022
    • FCI Holdings Delaware, Inc.
    • John C. Stankus
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Reinforcement of arch type structure with beveled/skewed ends
    • Patent number 7,217,064
    • Issue date May 15, 2007
    • Michael W. Wilson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Peripherally flexible prop arch for mining tracks, tunnels or the like
    • Patent number 4,630,973
    • Issue date Dec 23, 1986
    • Bochumer Eisenhuette Heintzmann GmbH & Co KG
    • Peter Heintzmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wall element for an underground gallery
    • Patent number 4,465,404
    • Issue date Aug 14, 1984
    • Bochumer Eisenhuette Heintzmann GmbH & Co KG
    • Peter Heintzmann
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Continuous gallery construction, in particular for underground mine...
    • Patent number 4,439,065
    • Issue date Mar 27, 1984
    • Artur Constapel
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wall supporting arrangement, especially for supporting mine gallery...
    • Patent number 4,187,037
    • Issue date Feb 5, 1980
    • Rudolf Seiz
    • Rudolf Seiz
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method and device for lining chambers and galleries
    • Patent number 4,100,749
    • Issue date Jul 18, 1978
    • Runrkohle, A. G.
    • Gerd Radner
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Profile steel
    • Patent number 4,050,212
    • Issue date Sep 27, 1977
    • Hoesch Werke Aktiengesellschaft
    • Franz Gantke
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Voussoir for a lining, and method for constructing the lining
    • Patent number 3,946,567
    • Issue date Mar 30, 1976
    • Pont-A-Mousson S.A.
    • Jacques Francois Oger
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3783625
    • Patent number 3,783,625
    • Issue date Jan 8, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3168815
    • Patent number 3,168,815
    • Issue date Feb 9, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3097727
    • Patent number 3,097,727
    • Issue date Jul 16, 1963
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3097494
    • Patent number 3,097,494
    • Issue date Jul 16, 1963
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3023862
    • Patent number 3,023,862
    • Issue date Mar 6, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3022100
    • Patent number 3,022,100
    • Issue date Feb 20, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2713774
    • Patent number 2,713,774
    • Issue date Jul 26, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2185916
    • Patent number 2,185,916
    • Issue date Jan 2, 1940
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2149232
    • Patent number 2,149,232
    • Issue date Feb 28, 1939
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2062686
    • Patent number 2,062,686
    • Issue date Dec 1, 1936
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1975043
    • Patent number 1,975,043
    • Issue date Sep 25, 1934
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents