Assignee
Inventors
- Peter Schwarzmaier (9 patents)
- Walter Frohlich (7 patents)
- Wenzel Kuhn (4 patents)
- Josef Riedl (31 patents)
- Iwo Schaffelhofer (4 patents)
- Erich Mittermaier (2 patents)
- Reinhard Krumbock (5 patents)
US Patent 4747914 · Granted May 31, 1988