Assignee
Inventors
- Ortwin Grzanna (1 patents)
- Manfred Koesfeld (1 patents)
- Rolf Weber (7 patents)
- Aloysius Steuer (1 patents)
- Horst Romswinkel (1 patents)
- Dieter Fremgen (12 patents)
- Dieter Kastrop (1 patents)
US Patent 4693767 · Granted Sep 15, 1987