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Willi Johnen
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Roetgen, DE
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last 30 patents
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Patent Grant
Oil removing device for cleaning pipes that are present in the form...
Patent number
6,862,818
Issue date
Mar 8, 2005
Otto Junker GmbH
Willi Johnen
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
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Patent Application
Oil removing device for cleaning pipes that are present in the form...
Publication number
20040020071
Publication date
Feb 5, 2004
Willi Johnen
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...