Manfred Koppers

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Duisburg, DT

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Patents Grantslast 30 patents

Information Patent Grant
Canopy and shield structure for supporting a shield in a seam-like...
- Patent number 4,089,181
- Issue date May 16, 1978
- Thyssen Industrie AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof support shield structure for use in an excavation
- Patent number 4,077,223
- Issue date Mar 7, 1978
- Rheinstahl AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING
Information Patent Grant
Roof support structure for excavations
- Patent number 3,983,709
- Issue date Oct 5, 1976
- Rheinstahl AG
- Manfred Koppers
- E21 - EARTH DRILLING MINING