TREA

Built-in cleaning devices

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Industry

  • CPC
  • E21D15/155
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Parent Industries

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

Current Industry

E21D15/155Built-in cleaning devices
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    2915019
    • Patent number 2,915,019
    • Issue date Dec 1, 1959
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    2713773
    • Patent number 2,713,773
    • Issue date Jul 26, 1955
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    2686649
    • Patent number 2,686,649
    • Issue date Aug 17, 1954
    • E04 - BUILDING
  • Information Patent Grant

    2641514
    • Patent number 2,641,514
    • Issue date Jun 9, 1953
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    2618122
    • Patent number 2,618,122
    • Issue date Nov 18, 1952
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    2290507
    • Patent number 2,290,507
    • Issue date Jul 21, 1942
    • B66 - HOISTING LIFTING HAULING