TREA

Cap joints for obtaining a coal-face free of pit-props

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Industry

  • CPC
  • E21D17/08
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D17/00Caps for supporting mine roofs

Current Industry

E21D17/08Cap joints for obtaining a coal-face free of pit-props
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Telescopic support caps, e.g. for use in mining
    • Patent number 3,991,577
    • Issue date Nov 16, 1976
    • Heuilleres du Bassin de Lorraine
    • Jean P. Thevenoux
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3762172
    • Patent number 3,762,172
    • Issue date Oct 2, 1973
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3614141
    • Patent number 3,614,141
    • Issue date Oct 19, 1971
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3455113
    • Patent number 3,455,113
    • Issue date Jul 15, 1969
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3312071
    • Patent number 3,312,071
    • Issue date Apr 4, 1967
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3240021
    • Patent number 3,240,021
    • Issue date Mar 15, 1966
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3217498
    • Patent number 3,217,498
    • Issue date Nov 16, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3216202
    • Patent number 3,216,202
    • Issue date Nov 9, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3216168
    • Patent number 3,216,168
    • Issue date Nov 9, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3163011
    • Patent number 3,163,011
    • Issue date Dec 29, 1964
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3091088
    • Patent number 3,091,088
    • Issue date May 28, 1963
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3043108
    • Patent number 3,043,108
    • Issue date Jul 10, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3018126
    • Patent number 3,018,126
    • Issue date Jan 23, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2997319
    • Patent number 2,997,319
    • Issue date Aug 22, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991100
    • Patent number 2,991,100
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991103
    • Patent number 2,991,103
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991102
    • Patent number 2,991,102
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991097
    • Patent number 2,991,097
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991104
    • Patent number 2,991,104
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991098
    • Patent number 2,991,098
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991099
    • Patent number 2,991,099
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2991101
    • Patent number 2,991,101
    • Issue date Jul 4, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2959924
    • Patent number 2,959,924
    • Issue date Nov 15, 1960
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    2959438
    • Patent number 2,959,438
    • Issue date Nov 8, 1960
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2915328
    • Patent number 2,915,328
    • Issue date Dec 1, 1959
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2884272
    • Patent number 2,884,272
    • Issue date Apr 28, 1959
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2822437
    • Patent number 2,822,437
    • Issue date Feb 4, 1958
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    2780067
    • Patent number 2,780,067
    • Issue date Feb 5, 1957
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2749712
    • Patent number 2,749,712
    • Issue date Jun 12, 1956
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2729945
    • Patent number 2,729,945
    • Issue date Jan 10, 1956
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents