Assignee
Inventors
- Petrus Johannes Kobussen (5 patents)
- Josinus Johannes Jacobus Petrus Kobussen (2 patents)
- Martinus Wilhelmus Hendricus Kobussen (2 patents)
- Hendricus Franciscus Gerardus Smulders (2 patents)
US Patent 6331104 · Granted Dec 18, 2001