Siegfried Franke

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Ochsenfurt, DE

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Patents Grantslast 30 patents

Information Patent Grant
Process for the production of fiber-containing plaster boards
- Patent number 4,214,027
- Issue date Jul 22, 1980
- Gebr. Knauf Westdeutsche Gipswerke
- Alfons Knuaf
- B28 - WORKING CEMENT, CLAY, OR STONE