TREA

Johann van Es

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  • Sherwood Park, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Apparatus for directional coring
    • Patent number 5,052,502
    • Issue date Oct 1, 1991
    • Baker Hughes Incorporated
    • Rainer Jurgens
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Method for directional coring
    • Patent number 5,029,653
    • Issue date Jul 9, 1991
    • Baker Hughes Incorporated
    • Rainer Jurgens
    • E21 - EARTH DRILLING MINING