Assignee
Inventors
- Wolfgang von der Saal (29 patents)
- Walter-Gunar Friebe (52 patents)
- Alfred Mertens (36 patents)
- Bernd Muller-Beckmann (18 patents)
- Gisbert Sponer (19 patents)
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Skip to contentUS Patent 4835167 · Granted May 30, 1989