Hans A. Friedrichs

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Solingen, DE

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for the extraction of metals from metal-containing raw ma...
- Patent number 5,314,171
- Issue date May 24, 1994
- Osaka Fuji Corporation
- Hans A. Friedrichs
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Method and apparatus for the extraction of metals from metal-contai...
- Patent number 5,261,943
- Issue date Nov 16, 1993
- Vereinigte Aluminium-Werke A.G.
- Hans A. Friedrichs
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...