Assignee
Inventors
- Heinrich Putz (5 patents)
- Friedhelm Nowitzki (1 patents)
- Gunter Damm (2 patents)
- Hartmut Bathelt (2 patents)
- Gunter Kromer (5 patents)
- Henning Hoffmann (20 patents)
- Reiner Pischke (4 patents)
US Patent 4926634 · Granted May 22, 1990