Assignee
No assignee recorded.
Inventors
- Helga Franke (18 patents)
- Heinrich Franke (11 patents)
- Hans-Rudolf Kruger (21 patents)
- Hartmut Joppien (21 patents)
- Dietrich Baumert (13 patents)
- David Giles (6 patents)
US Patent 4791123 · Granted Dec 13, 1988
No assignee recorded.