Assignee
Inventors
- Hans Landwehrkamp (14 patents)
- Inge Stockert (1 patents)
- A. A. Ball (1 patents)
- Thorsten Buchner (4 patents)
- Wolfgang Thierron (5 patents)
- Sohrab Tabibi (4 patents)
- Heinz Muller (27 patents)
US Patent 5420439 · Granted May 30, 1995