Assignee
Inventors
- Joachim Heider (28 patents)
- Norbert Hauel (85 patents)
- Volkhard Austel (48 patents)
- Klaus Noll (37 patents)
- Andreas Bomhard (12 patents)
- Jacques van Meel (12 patents)
- Willi Diederen (19 patents)
US Patent 4716169 · Granted Dec 29, 1987