Assignee
Inventors
- Jochen Range (1 patents)
- Bernd Hohlein (3 patents)
- Hans W. J. Niessen (1 patents)
- Volker Vau (1 patents)
- H. J. R. Schiebahn (1 patents)
- Horst Hoffmann (1 patents)
- Manfred Vorwerk (2 patents)
US Patent 4839391 · Granted Jun 13, 1989