Helmut Erwien

Follow

Person

Lunen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Chain stripper devices and assemblies for mining machines
- Patent number 4,445,878
- Issue date May 1, 1984
- Gewerkschaft Eisenhutte Westfalia
- Horst Linke
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Longwall mineral mining installation
- Patent number 4,389,072
- Issue date Jun 21, 1983
- Gewerkschaft Eisenhutte Westfalia
- Horst Linke
- E21 - EARTH DRILLING MINING
Information Patent Grant
Anchoring apparatus for a mining installation
- Patent number 4,176,884
- Issue date Dec 4, 1979
- Gewerkschaft Eisenhutte Westfalia
- Helmut Erwien
- E21 - EARTH DRILLING MINING