Assignee
Inventors
- Hans de Brouwer (5 patents)
- Robert Dirk van Grampel (2 patents)
- James Franklin Hoover (46 patents)
- Adrianus Alphonsus Maria Kusters (4 patents)
- Jan-Pleun Lens (59 patents)
- Andries Jakobus Petrus van Zyl (8 patents)
US Patent 9260561 · Granted Feb 16, 2016