Assignee
Inventors
- Karl-Heinz Boehning (9 patents)
- Gerd Duembgen (13 patents)
- Ulrich Hammon (91 patents)
- Richard Krabetz (17 patents)
- Franz Merger (148 patents)
- Matthias Schwarzmann (44 patents)
- Fritz Thiessen (6 patents)
- Herbert Vogel (14 patents)
US Patent 5221767 · Granted Jun 22, 1993