Assignee
Inventors
- Jan Boer (15 patents)
- Hendrik van Bokhorst (14 patents)
- Wilhelmus Diepstraten (34 patents)
- Adriaan Kamerman (27 patents)
- Rienk Mud (7 patents)
- Hans van Driest (29 patents)
- Robert John Kopmeiners (10 patents)
US Patent 5987033 · Granted Nov 16, 1999