TREA

the lock also being activated

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Industry

  • CPC
  • E21D15/588
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Parent Industries

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

Current Industry

E21D15/588the lock also being activated
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3051431
    • Patent number 3,051,431
    • Issue date Aug 28, 1962
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2938699
    • Patent number 2,938,699
    • Issue date May 31, 1960
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2928643
    • Patent number 2,928,643
    • Issue date Mar 15, 1960
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents