Assignee
Inventors
- August Lehner (45 patents)
- Helmut Kopke (9 patents)
- Hermann Roller (21 patents)
- Werner Balz (34 patents)
- Werner Grau (26 patents)
- Eberhard Koester (23 patents)
- Friedrich Sommermann (7 patents)
US Patent 4567108 · Granted Jan 28, 1986