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Cutting machine
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Patent number 4,589,701
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Issue date May 20, 1986
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Gewerkschaft Eisenhutte Westfalia
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Klaus Beckmann
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E21 - EARTH DRILLING MINING
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Mine roof support unit
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Patent number 4,465,406
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Issue date Aug 14, 1984
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Gewerkschaft Eisenhutte Westfalia
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Klaus Beckmann
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E21 - EARTH DRILLING MINING
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Control apparatus
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Patent number 4,443,135
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Issue date Apr 17, 1984
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Gewerkschaft Eisenhutte Westfalia
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Klaus Beckmann
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E21 - EARTH DRILLING MINING
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-
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Mineral mining installation
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Patent number 4,251,110
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Issue date Feb 17, 1981
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Gewerkschaft Eisenhutte Westfalia
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Klaus Beckmann
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E21 - EARTH DRILLING MINING
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Mineral mining installation
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Patent number 4,200,338
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Issue date Apr 29, 1980
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Gewerkschaft Eisenhutte Westfalia
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Klaus Beckmann
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E21 - EARTH DRILLING MINING
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