Assignee
Inventors
- Helmut Hagen (71 patents)
- Ulrich Eichenauer (17 patents)
- Rolf-Dieter Kohler (18 patents)
- Unknown
- Thomas Liese-Sauer (3 patents)
- Karl Eicken (126 patents)
- Bruno Wuerzer (235 patents)
- Norbert Meyer (103 patents)
US Patent 4804404 · Granted Feb 14, 1989