Assignee
Inventors
- Helmut Biere (20 patents)
- Andreas Huth (65 patents)
- Dieter Rahtz (23 patents)
- Ralph Schmiechen (34 patents)
- Dieter Seidelmann (43 patents)
- Herbert Schneider (36 patents)
- David N. Stephens (19 patents)
US Patent 4952698 · Granted Aug 28, 1990