Assignee
Inventors
- Gottfried Seifert (18 patents)
- Sebastian Staubli (5 patents)
- Josef H. Wieland (1 patents)
- Willy Regenass (2 patents)
- Martin Buerli (1 patents)
- John G. Lee (1 patents)
- Richard B. Lund (11 patents)
US Patent 4922008 · Granted May 1, 1990