TREA

hydraulic or pneumatic

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Industry

  • CPC
  • E21D15/545
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Parent Industries

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

Current Industry

E21D15/545hydraulic or pneumatic
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3184206
    • Patent number 3,184,206
    • Issue date May 18, 1965
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents