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Harry L. Karlsson

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  • Sandviken, SE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roller bit
    • Patent number 5,005,989
    • Issue date Apr 9, 1991
    • Sandvik AB
    • Harry L. Karlsson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Rotary drill bit
    • Patent number 4,516,640
    • Issue date May 14, 1985
    • Santrade Ltd.
    • Harry L. Karlsson
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Lubricating device
    • Patent number 4,399,878
    • Issue date Aug 23, 1983
    • Sandvik Aktiebolag
    • Harry L. Karlsson
    • E21 - EARTH DRILLING MINING