TREA

by a tiltable collar surrounding one or both parts

Follow

Industry

  • CPC
  • E21D15/36
This industry / category may be too specific. Please go to a parent level for more data

Parent Industries

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

Current Industry

E21D15/36by a tiltable collar surrounding one or both parts
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2650852
    • Patent number 2,650,852
    • Issue date Sep 1, 1953
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1674105
    • Patent number 1,674,105
    • Issue date Jun 19, 1928
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1475146
    • Patent number 1,475,146
    • Issue date Nov 20, 1923
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents