TREA

Eberhard Unger

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  • Lunen, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drive shield
    • Patent number 4,143,519
    • Issue date Mar 13, 1979
    • Gewerkschaft Eisenhutte Westfalia
    • Eberhard Unger
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Apparatus for and method of driving tunnels
    • Patent number 4,118,938
    • Issue date Oct 10, 1978
    • Gewerkschaft Eisenhutte Westfalia
    • Eberhard Unger
    • E21 - EARTH DRILLING MINING