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Herwig Wrulich
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Zeltweg, OE
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last 30 patents
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Patent Grant
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Patent number
4,091,692
Issue date
May 30, 1978
Vereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellsc...
Herwig Wrulich
E21 - EARTH DRILLING MINING
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Patent Grant
Device for guying a movable cutting machine
Patent number
4,076,317
Issue date
Feb 28, 1978
Vereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellsc...
Alfred Zitz
E21 - EARTH DRILLING MINING