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Richard Koehl
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Niederbronn les Bains, FR
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last 30 patents
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Patent Grant
Method for fabricating an impeller assembly and shaft having an int...
Patent number
4,606,103
Issue date
Aug 19, 1986
De Dietrich (USA), Inc.
Richard Koehl
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Agitator including impeller assembly and shaft having interference fit
Patent number
4,508,455
Issue date
Apr 2, 1985
De Dietrich (USA), Inc.
Michael J. Lerman
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Impeller assembly and shaft having interference fit
Patent number
4,491,421
Issue date
Jan 1, 1985
De Dietrich (USA), Inc.
Richard Koehl
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL