Assignee
Inventors
- Jens-Peter Holck (9 patents)
- Alfred Mertens (36 patents)
- Unknown
- Bernd Muller-Beckmann (18 patents)
- Gisbert Sponer (19 patents)
- Klaus Strein (35 patents)
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Skip to contentUS Patent 4666923 · Granted May 19, 1987