Assignee
Inventors
- Dieter Eckardt (20 patents)
- Gerhard Hettich (30 patents)
- Kurt Metzger (8 patents)
- Sonja Polster (1 patents)
- Hans-Dieter Schmid (21 patents)
- Hans-Jorg Schmidt (2 patents)
- Hans Schrumpf (12 patents)
US Patent 4768375 · Granted Sep 6, 1988