TREA

Donald L. Leibee

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  • Bedford, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drill bit
    • Patent number 4,711,312
    • Issue date Dec 8, 1987
    • The Marmon Group, Inc.
    • Donald L. Leibee
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Drill bit
    • Patent number 4,605,079
    • Issue date Aug 12, 1986
    • The Marmon Group
    • Donald L. Leibee
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Freely rotatable pick bit holder on rotary driven member and method
    • Patent number 4,371,210
    • Issue date Feb 1, 1983
    • Kennametal Inc.
    • Donald L. Leibee
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Tool for cutting groove in hole
    • Patent number 3,960,222
    • Issue date Jun 1, 1976
    • Kennametal Inc.
    • Donald L. Leibee
    • E21 - EARTH DRILLING MINING