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Klaus Liethschmidt
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Frechen, DE
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last 30 patents
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Patent Grant
Ceramic material permitting the passage of fluids and based on sili...
Patent number
5,093,289
Issue date
Mar 3, 1992
Heliotronic Forschungs- und Entwicklungsgesellschaft fur Solarzellen-Grundsto...
Volker Braetsch
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES