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Klaus Seeberger
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Werne, DE
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last 30 patents
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Patent Grant
Roof supports
Patent number
4,815,898
Issue date
Mar 28, 1989
Gewerkschaft Eisenhutte Westfalia GmbH
Egon Wojaczek
E21 - EARTH DRILLING MINING
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Patent Grant
Mine roof supports
Patent number
4,191,497
Issue date
Mar 4, 1980
Gewerkschaft Eisenhutte Westfalia
Helmut Poklekowski
E21 - EARTH DRILLING MINING