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Ludwig Wirth
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Wiesbaden, DE
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last 30 patents
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Patent Grant
Heat-insulating shaped fibrous articles and a process for producing...
Patent number
4,950,362
Issue date
Aug 21, 1990
Didier-Werke AG
Peter Steinau
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Patent Grant
Refractory shapes of ceramic fiber-containing material
Patent number
4,737,326
Issue date
Apr 12, 1988
Didier-Werke AG
Ludwig Wirth
B28 - WORKING CEMENT, CLAY, OR STONE
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Patent Grant
Method of ceramic molding which produces a porosity gradient and th...
Patent number
4,710,480
Issue date
Dec 1, 1987
Didier-Werke AG
Rudiger Buschmann
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES