Inventor

ERWIEN HELMUT

DE4 patents

Patents

4 patents

US4389072AJun 21, 1983

Longwall mineral mining installation

GEWERK EISENHUETTE WESTFALIA13 citations68

US4445878AMay 1, 1984

Chain stripper devices and assemblies for mining machines

GEWERK EISENHUETTE WESTFALIA6 citations55

US4176884ADec 4, 1979

Anchoring apparatus for a mining installation

GEWERK EISENHUETTE WESTFALIA6 citations55

US4094157AJun 13, 1978

Anchoring apparatus for anchoring a mining installation

GEWERK EISENHUETTE WESTFALIA4 citations55