Assignee
Inventors
- Alfred Schraut (13 patents)
- Peter Janda (2 patents)
- Nikolaus D. Mackert (2 patents)
- Dieter Howorka (1 patents)
- Werner Fricke (4 patents)
- Winfried Sturmer (21 patents)
- Horst Schwarz (8 patents)
US Patent 4751990 · Granted Jun 21, 1988