Assignee
Inventors
- Isidoor De Grave (19 patents)
- Joachim Fischer (45 patents)
- Wolfram Koegel (5 patents)
- Hermann Tatzel (11 patents)
- Onno Graalmann (12 patents)
- Juergen Kerth (25 patents)
- Rainer A. Werner (12 patents)
US Patent 5077322 · Granted Dec 31, 1991