Assignee
Inventors
- Peter Hermentin (17 patents)
- Michael Paal (16 patents)
- Hans Kraemer (39 patents)
- Cenek Kolar (23 patents)
- Dieter Hoffmann (39 patents)
- Manfred Gerken (13 patents)
- Hans G. Berscheid (8 patents)
- Dirk Bottger (8 patents)
US Patent 4948880 · Granted Aug 14, 1990