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Peter Stroncik
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Osterholz-Scharmbeck, DE
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Patent Grant
Quartz-free powdered magmatic nepheline rock material for the surfa...
Patent number
5,380,356
Issue date
Jan 10, 1995
BEGO Bremer Goldschlagerei Wilh. Herbst GmbH & Co.
Hans-Werner Gundlach
A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE