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Hans-Dieter Knopfel
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Frankenthal, DE
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last 30 patents
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Patent Grant
Impeller for centrifugal pumps
Patent number
4,208,169
Issue date
Jun 17, 1980
Klein, Schanzlin & Becker Aktiengesellschaft
Karl-Heinz Becker
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...