TREA

Henry L. Roye

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  • Stigler, OK, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Radial mining method
    • Patent number 4,195,886
    • Issue date Apr 1, 1980
    • Henry L. Roye
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Radial mining method
    • Patent number 4,072,351
    • Issue date Feb 7, 1978
    • Henry L. Roye
    • E21 - EARTH DRILLING MINING