TREA

with essential hydraulic or pneumatic details

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Industry

  • CPC
  • E21D15/465
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Parent Industries

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

Current Industry

E21D15/465with essential hydraulic or pneumatic details
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3548867
    • Patent number 3,548,867
    • Issue date Dec 22, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3197168
    • Patent number 3,197,168
    • Issue date Jul 27, 1965
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2638075
    • Patent number 2,638,075
    • Issue date May 12, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2474464
    • Patent number 2,474,464
    • Issue date Jun 28, 1949
    • E21 - EARTH DRILLING MINING