Assignee
Inventors
- Horst Boettge (1 patents)
- Wilhelm Mitzel (15 patents)
- Herbert Bernardi (8 patents)
- Josef Geier (10 patents)
- Norbert Osswald (1 patents)
- Gerd von Aschwege (3 patents)
- Robert Schaetz (1 patents)
US Patent 4236639 · Granted Dec 2, 1980