Assignee
Inventors
- Albert Kohl (37 patents)
- Milena Melzer (12 patents)
- August Lehner (45 patents)
- Norbert Schneider (89 patents)
- Eberhard Koester (23 patents)
- Werner Balz (34 patents)
- Friedrich Sommermann (7 patents)
- Ernst Ricker (2 patents)
US Patent 4668586 · Granted May 26, 1987