Assignee
No assignee recorded.
Inventors
- Helmut Schonenberger (8 patents)
- Erwin von Angerer (11 patents)
- Johann Karl (40 patents)
- Margaretha Jennerwein (2 patents)
- Jurgen Engel (108 patents)
US Patent 4730068 · Granted Mar 8, 1988
No assignee recorded.