Otto Zeller

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Braunau, AT

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Patents Grantslast 30 patents

Information Patent Grant
Process for preparing water-repellent articles from gypsum powder c...
- Patent number 4,851,047
- Issue date Jul 25, 1989
- Wacker-Chemie GmbH
- Ulrich Demlehner
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES