TREA

Details of wedges

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Industry

  • CPC
  • E21D15/43
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Parent Industries

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

Current Industry

E21D15/43Details of wedges
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Free standing support
    • Patent number 8,092,121
    • Issue date Jan 10, 2012
    • Anthony John Spencer Spearing
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Free standing support
    • Patent number 7,914,238
    • Issue date Mar 29, 2011
    • Anthony John Spencer Spearing
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3055463
    • Patent number 3,055,463
    • Issue date Sep 25, 1962
    • 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

    2650475
    • Patent number 2,650,475
    • Issue date Sep 1, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2450374
    • Patent number 2,450,374
    • Issue date Sep 28, 1948
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2312476
    • Patent number 2,312,476
    • Issue date Mar 2, 1943
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1847660
    • Patent number 1,847,660
    • Issue date Mar 1, 1932
    • E04 - BUILDING
  • Information Patent Grant

    1544331
    • Patent number 1,544,331
    • Issue date Jun 30, 1925
    • B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

  • Information Patent Application

    SUPPORT PROP
    • Publication number 20140072374
    • Publication date Mar 13, 2014
    • ELBROC MINING PRODUCTS (PTY) LTD
    • Grant ROACH
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    FREE STANDING SUPPORT
    • Publication number 20110114813
    • Publication date May 19, 2011
    • Anthony John Spencer SPEARING
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    Free Standing Support
    • Publication number 20070267559
    • Publication date Nov 22, 2007
    • Anthony John Spencer Spearing
    • E21 - EARTH DRILLING MINING