TREA

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Industry

  • CPC
  • E21D1/04
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D1/00Sinking shafts

Current Industry

E21D1/04with grabs
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3537601
    • Patent number 3,537,601
    • Issue date Nov 3, 1970
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3386253
    • Patent number 3,386,253
    • Issue date Jun 4, 1968
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3187916
    • Patent number 3,187,916
    • Issue date Jun 8, 1965
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3123240
    • Patent number 3,123,240
    • Issue date Mar 3, 1964
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    3067895
    • Patent number 3,067,895
    • Issue date Dec 11, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3023044
    • Patent number 3,023,044
    • Issue date Feb 27, 1962
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    2949201
    • Patent number 2,949,201
    • Issue date Aug 16, 1960
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    2849138
    • Patent number 2,849,138
    • Issue date Aug 26, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2849139
    • Patent number 2,849,139
    • Issue date Aug 26, 1958
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2781140
    • Patent number 2,781,140
    • Issue date Feb 12, 1957
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    2726782
    • Patent number 2,726,782
    • Issue date Dec 13, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2710700
    • Patent number 2,710,700
    • Issue date Jun 14, 1955
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    2606679
    • Patent number 2,606,679
    • Issue date Aug 12, 1952
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2587844
    • Patent number 2,587,844
    • Issue date Mar 4, 1952
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    2491583
    • Patent number 2,491,583
    • Issue date Dec 20, 1949
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2426591
    • Patent number 2,426,591
    • Issue date Sep 2, 1947
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1337065
    • Patent number 1,337,065
    • Issue date Apr 13, 1920
    • B66 - HOISTING LIFTING HAULING