TREA

Daniel B. Justman

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  • Houston, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bearing structure for downhole motors
    • Patent number 5,037,212
    • Issue date Aug 6, 1991
    • Smith International, Inc.
    • Dan B. Justman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Wall contacting tool
    • Patent number 4,280,742
    • Issue date Jul 28, 1981
    • Smith International, Inc.
    • Daniel B. Justman
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Reamer-stabilizer
    • Patent number 4,262,760
    • Issue date Apr 21, 1981
    • Smith International, Inc.
    • Glenn L. Allison
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roller cutter drill bit
    • Patent number 4,037,673
    • Issue date Jul 26, 1977
    • Reed Tool Company
    • Daniel B. Justman
    • E21 - EARTH DRILLING MINING