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Anti-dandruff shampoo
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Patent number 5,494,675
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Issue date Feb 27, 1996
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Rutgerswerke Aktiengesellschaft
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Helmut Beilharz
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Huminates, process and uses
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Patent number 5,284,651
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Issue date Feb 8, 1994
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Rutgerswerke Aktiengesellschaft AG
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Urs N. Riede
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Method of protecting fish
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Patent number 4,942,181
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Issue date Jul 17, 1990
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Rutgerswerke AG
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Urs N. Riede
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE