Assignee
Inventors
- Helmut Ballhause (2 patents)
- Gunther Engelhardt (18 patents)
- Claus A. Landgraf (1 patents)
- Norbert Mayer (27 patents)
- Willy Roth (5 patents)
- Kurt Schumacher (1 patents)
- Alex Prox (1 patents)
US Patent 5114935 · Granted May 19, 1992