Assignee
Inventors
- Albrecht Franke (30 patents)
- Wolfgang Spiegler (19 patents)
- Hardo Siegel (53 patents)
- Claus Mueller (47 patents)
- Gerda von Philipsborn (20 patents)
- Dieter Lenke (47 patents)
- Josef Gries (36 patents)
US Patent 5118685 · Granted Jun 2, 1992