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Hans G. Schwarz
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Springe, DE
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last 30 patents
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Patent Grant
Method of manufacturing cement bonded boards
Patent number
4,402,890
Issue date
Sep 6, 1983
Bison-werke Bahre & Greten GmbH & Co. KG
Rainer Offenhausen
B28 - WORKING CEMENT, CLAY, OR STONE