Assignee
Inventors
- Karl Konrath (37 patents)
- Claus Koester (4 patents)
- Karl Zibold (3 patents)
- Manfred Schwarz (24 patents)
- Karl-Friedrich Russeler (5 patents)
- Klaus Krieger (17 patents)
- Roland Kupzik (3 patents)
US Patent 4884542 · Granted Dec 5, 1989