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Walter Wetzels
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Aachen, DE
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last 30 patents
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Patent Grant
Apparatus for the inner profiling of tubes or pipes
Patent number
5,782,121
Issue date
Jul 21, 1998
Schumag AG
Walter Wetzels
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for preparing a tubular blank having a thick wall for a foll...
Patent number
5,533,376
Issue date
Jul 9, 1996
Schumag AG
Walter Wetzels
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for the inner profiling of tubes or pipes
Patent number
5,524,467
Issue date
Jun 11, 1996
Schumag Aktiengesellschaft
Walter Wetzels
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Device for centerless grinding of rotation-symmetrical surfaces on...
Patent number
4,441,280
Issue date
Apr 10, 1984
Schumag GmbH
Walter Wetzels
B24 - GRINDING POLISHING
Information
Patent Grant
Method and device for straightening elongated drawn round stock
Patent number
4,356,715
Issue date
Nov 2, 1982
Schumag GmbH
Erwin Bock
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...