Assignee
Inventors
- Jacobus A. J. den Hartog (19 patents)
- Gerben M. Visser (9 patents)
- Bartholomeus J. Van Steen (6 patents)
- Martinus T. M. Tulp (10 patents)
- Eric Ronken (5 patents)
- Cornelis G. Kruse (55 patents)
US Patent 6281216 · Granted Aug 28, 2001