Assignee
Inventors
- Nikolaus Spiegel (23 patents)
- Hans-Georg Jahn (19 patents)
- Hermann Beisel (19 patents)
- Helmut Jager (16 patents)
- Wolfgang Pfizenmaier (10 patents)
- Unknown
- Andreas Geider (3 patents)
- Walter Hofheinz (7 patents)
US Patent 5289775 · Granted Mar 1, 1994