TREA

by means of hydraulic devices

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Industry

  • CPC
  • E21D15/603
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Parent Industries

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

Current Industry

E21D15/603by means of hydraulic devices
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3012404
    • Patent number 3,012,404
    • Issue date Dec 12, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2997272
    • Patent number 2,997,272
    • Issue date Aug 22, 1961
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2677535
    • Patent number 2,677,535
    • Issue date May 4, 1954
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1924477
    • Patent number 1,924,477
    • Issue date Aug 29, 1933
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    1752101
    • Patent number 1,752,101
    • Issue date Mar 25, 1930
    • E21 - EARTH DRILLING MINING