Assignee
Inventors
- Josef Roch (15 patents)
- Armin Heckel (63 patents)
- Josef Nickl (27 patents)
- Erich Muller (32 patents)
- Berthold Narr (37 patents)
- Rainer Zimmermann (13 patents)
- Johannes Weisenberger (47 patents)
US Patent 4714698 · Granted Dec 22, 1987