Assignee
Inventors
- Heinz Gries (66 patents)
- Douwe Rosenberg (8 patents)
- Hanns-Joachim Weinmann (70 patents)
- Ulrich Speck (90 patents)
- Wolfgang Mutzel (14 patents)
- Georg-Alexander Hayden (1 patents)
- Heinrich Pfeiffer (22 patents)
US Patent 4963344 · Granted Oct 16, 1990