Assignee
Inventors
- Bernd Ostersehlt (5 patents)
- Albrecht Franke (30 patents)
- Fritz-Frieder Frickel (27 patents)
- Marco Thyes (30 patents)
- Ludwig Friedrich (12 patents)
- Josef Gries (36 patents)
- Dieter Lenke (47 patents)
US Patent 4514413 · Granted Apr 30, 1985