Assignee
Inventors
- August Lehner (45 patents)
- Albert Kohl (37 patents)
- Hermann Roller (21 patents)
- Werner Lenz (51 patents)
- Ludwig Kreitner (8 patents)
- Helmut Kopke (9 patents)
- Friedrich Sommermann (7 patents)
- Ernst Ricker (2 patents)
US Patent 5064721 · Granted Nov 12, 1991