Assignee
Inventors
- Adrianus Marinus Ledeboer (19 patents)
- Jan Maat (13 patents)
- Cornelis Theodorus Verrips (34 patents)
- Christiaan Visser (4 patents)
- Zbigniew A. Janowicz (5 patents)
- Cornelis P. Hollenberg (7 patents)
US Patent 5240838 · Granted Aug 31, 1993