TREA

Burckhard Elsner

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  • Lunen, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Mine roof supports
    • Patent number 4,449,860
    • Issue date May 22, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Drilling apparatus
    • Patent number 4,448,263
    • Issue date May 15, 1984
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Two part mine roof support unit
    • Patent number 4,401,399
    • Issue date Aug 30, 1983
    • Gewerkschaft Eisenhutte Westfalia
    • Kunibert Becker
    • E21 - EARTH DRILLING MINING