TREA

Rudolf Kvapil

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  • Tucson, AZ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    In situ oil shale retort system
    • Patent number 4,441,759
    • Issue date Apr 10, 1984
    • Occidental Oil Shale, Inc.
    • Ned M. Hutchins
    • E21 - EARTH DRILLING MINING