Helmut Wlach

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Zeltweg, OE

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Patents Grantslast 30 patents

Information Patent Grant
Device for consecutively supporting a drift
- Patent number 4,075,856
- Issue date Feb 28, 1978
- Vereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellsc...
- Siegfried Sigott
- E21 - EARTH DRILLING MINING