Gerhard Haake

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Freiberg, DD

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of pure aluminum oxide
- Patent number 4,244,928
- Issue date Jan 13, 1981
- VEB Mansfeld Kombinat William Pieck
- Siegfried Ziegenbalg
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of pure aluminum oxide
- Patent number 4,224,287
- Issue date Sep 23, 1980
- VEB Mansfeld Kombinat Wilhelm Pieck
- Siegfried Ziegenbalg
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...