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Distributor
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Patent number 4,737,052
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Issue date Apr 12, 1988
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Gewerkschaft Eisenhutte Westfalia GmbH
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Walter Weirich
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E21 - EARTH DRILLING MINING
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Hydraulic coupling device
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Patent number 4,544,185
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Issue date Oct 1, 1985
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Gewerkschaft Eisenhutte Westfalia
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Walter Weirich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Mine roof supports
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Patent number 4,422,807
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Issue date Dec 27, 1983
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Gewerkschaft Eisenhutte Westfalia
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Michael Dettmers
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E21 - EARTH DRILLING MINING
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Hydraulic coupling device
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Patent number 4,378,124
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Issue date Mar 29, 1983
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Gewerkschaft Eisenhutte Westfalia
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Walter Weirich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Hydraulic coupling device
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Patent number 4,247,135
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Issue date Jan 27, 1981
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Gewerkschaft Eisenhutte Westfalia
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Walter Weirich
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E21 - EARTH DRILLING MINING