Assignee
Inventors
- Volkhard Austel (48 patents)
- Joachim Heider (28 patents)
- Norbert Hauel (85 patents)
- Manfred Reiffen (28 patents)
- Josef Nickl (27 patents)
- Jacobus Van Meel (25 patents)
- Willi Diederen (19 patents)
US Patent 4722929 · Granted Feb 2, 1988