Assignee
Inventors
- Juergen Kerth (25 patents)
- Rainer A. Werner (12 patents)
- Ralf Zolk (10 patents)
- Klaus-Dieter Ruempler (5 patents)
- Guenther Schweier (22 patents)
- Rudolf Mueller-Mall (10 patents)
- Wolfgang Gruber (38 patents)
US Patent 4977210 · Granted Dec 11, 1990