Assignee
Inventors
- Roelof Feenstra (13 patents)
- Josephus H. M. Lange (27 patents)
- Maria L. Pras-Raves (4 patents)
- Cornelis G. Kruse (55 patents)
- Herman H. Van Stuivenberg (17 patents)
- Tinka Tuinstra (3 patents)
- Hiskias G. Keizer (8 patents)
US Patent 7186741 · Granted Mar 6, 2007