Gerhard Zingel

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Krefeld, DE

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Patents Grantslast 30 patents

Information Patent Grant
Method of lining a steel-making furnace
- Patent number 4,468,780
- Issue date Aug 28, 1984
- Didier-Werke AG
- Franz Schellberg
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES