TREA

Allan; David Thomson

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  • BOTH OF, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Scabbler bit floor surfacing machine
    • Patent number 4,225,187
    • Issue date Sep 30, 1980
    • Allan; David Thomson
    • David T. Allan
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Fluid operated undercutter
    • Patent number 4,186,810
    • Issue date Feb 5, 1980
    • John MacDonald & Company (Pneumatic Tools) Limited
    • David T. Allan
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Fluid operated wall groove cutter
    • Patent number 4,140,347
    • Issue date Feb 20, 1979
    • John MacDonald & Co. (Pneumatic Tools) Ltd.
    • David T. Allan
    • B28 - WORKING CEMENT, CLAY, OR STONE