Karl Heinz Wehner

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Castrop-Rauxel, DT

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Patents Grantslast 30 patents

Information Patent Grant
Mine roof support
- Patent number 4,012,914
- Issue date Mar 22, 1977
- Klockner-Werke AG
- Karl Heinz Wehner
- E21 - EARTH DRILLING MINING
Information Patent Grant
Excavation roof support
- Patent number 3,990,251
- Issue date Nov 9, 1976
- Klockner-Werke AG
- Karl Heinz Wehner
- E21 - EARTH DRILLING MINING