Assignee
Inventors
- Johannes Gerardus De Vries (19 patents)
- Gerardus Karel Maria Verzijl (13 patents)
- Andreas Hendrikus Maria De Vries (13 patents)
- Vincent Ritleng (2 patents)
- Adeline Marie Joseèphe Voelklin (1 patents)
US Patent 7884223 · Granted Feb 8, 2011