Assignee
Inventors
- Arno Wegerhoff (4 patents)
- Hans Zengel (43 patents)
- Walter Brodowski (13 patents)
- Heinz Beck (12 patents)
- Ernst Seeberger (3 patents)
- Gerhard Steenken (5 patents)
- Karlheinz Hillermeider (3 patents)
US Patent 4471019 · Granted Sep 11, 1984