Klaus Spies

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Dortmund-Persebeck, DT

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for advancing and supporting an underground mi...
- Patent number 4,077,670
- Issue date Mar 7, 1978
- Bochumer Eisenhutte Heintzmann GmbH & Co.
- Klaus Spies
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof support
- Patent number 4,065,930
- Issue date Jan 3, 1978
- Bochumer Eisenhutte Heintzmann GmbH & Co.
- Klaus Spies
- E21 - EARTH DRILLING MINING