Assignee
Inventors
- Robert Albertus Brondijk (41 patents)
- Jakob Gerrit Nijboer (46 patents)
- Pope Ijtsma (29 patents)
- Paulus Gijsbertus Petrus Weijenbergh (8 patents)
- Johannes Hendrikus Maria Spruit (54 patents)
US Patent 8407415 · Granted Mar 26, 2013