Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7532986 | Particle sizing refinement system | Meindert Kleefstra, Isaac S. Simpson, John N. Skardon | 2009-05-12 |
| 7016791 | Particle sizing refinement system | Meindert Kleefstra, Isaac S. Simpson, John N. Skardon | 2006-03-21 |