Assignee
Inventors
- Hendrikus Jan Kapaan (44 patents)
- Jacobus Zwarts (16 patents)
- Bernardus Gerardus Van Leeuwen (5 patents)
- Nicolaas Kollaard (3 patents)
- Alexander Molenaar (4 patents)
- Frederic Ponson (14 patents)
US Patent 6848557 · Granted Feb 1, 2005