Assignee
Inventors
- Franz-Josef Bockeler (1 patents)
- Wolfgang Gobmann (1 patents)
- Axel Buchhorn (1 patents)
- Horst Jackenkroll (1 patents)
- Hubert Marks (2 patents)
- Karl-Hermann Witte (11 patents)
- Diethard Schnelle (2 patents)
US Patent 4922386 · Granted May 1, 1990