Egon Pfefferle

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Hamm, DE

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Patents Grantslast 30 patents

Information Patent Grant
Cutter bit assemblies and arrangements for use with mining or tunne...
- Patent number 5,092,660
- Issue date Mar 3, 1992
- Gewerkschaft Eisenhutte Westfalia
- Bernd Steinkuhl
- E21 - EARTH DRILLING MINING
Information Patent Grant
Floor cutters for mineral winning ploughs
- Patent number 4,819,990
- Issue date Apr 11, 1989
- Gewerkschaft Eisenhutte Westfallia GmbH
- Oswald Breuer
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mineral mining installations
- Patent number 4,715,659
- Issue date Dec 29, 1987
- Gewerkschaft Eisenhutte Westfalia GmbH
- Christoph Rassmann
- E21 - EARTH DRILLING MINING
Information Patent Grant
Control apparatus for inclination of longwall guide
- Patent number 4,462,637
- Issue date Jul 31, 1984
- Gewerkschaft Eisenhutte Westfalia
- Werner Rafael
- E21 - EARTH DRILLING MINING