Assignee
Inventors
- Helmut Steffes (75 patents)
- Norbert Ocvirk (38 patents)
- Gunther Buschmann (30 patents)
- Anton David (10 patents)
- Johannes Graeber (3 patents)
- Otto Determann (9 patents)
- Ivica Batistic (34 patents)
US Patent 4824182 · Granted Apr 25, 1989