TREA

David C. Johnston

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  • Greensburg, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Cutting insert
    • Patent number D431579
    • Issue date Oct 3, 2000
    • Kennametal Inc.
    • Rudi Hartlohner
    • D15 - Machines not elsewhere specified
  • Information Patent Grant

    Cutting insert
    • Patent number D423024
    • Issue date Apr 18, 2000
    • Kennametal Inc.
    • Rudi Hartlohner
    • D15 - Machines not elsewhere specified