Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5251762 | Electrostatic separation of particles | Arnold H. Jackson | 1993-10-12 |
| 4363723 | Multifield electrostatic separator | Frank S. Knoll, Peter J. Hoyles | 1982-12-14 |
| 4305797 | Material separation by dielectrophoresis | Frank S. Knoll | 1981-12-15 |