Assignee
Inventors
- Leendert Hendrik De Graaff (15 patents)
- Jacob Visser (35 patents)
- Henriette C. Van Den Broeck (8 patents)
- Francois Strozyk (4 patents)
- Felix Kormelink (5 patents)
- Johannes C. P. Boonman (4 patents)
US Patent 6010892 · Granted Jan 4, 2000