Assignee
Inventors
- Robert Piorr (25 patents)
- Guenter Panthel (8 patents)
- Karl Schmid (128 patents)
- Dietmar Colignon (6 patents)
- Hans J. Rommerskirchen (6 patents)
- Wolfgang Schmidt (98 patents)
- Horst Ritterbex (5 patents)
US Patent 4990288 · Granted Feb 5, 1991