Walter Viegner, Jr.

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Attendorn, DE

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Patents Grantslast 30 patents

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Method for producing a coupling on a pipe and device for producing...
- Patent number 7,770,429
- Issue date Aug 10, 2010
- Witzig & Frank GmbH
- Walter Viegner, Jr.
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...