Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4528103 | Pressure filter | Gordon Spilkin, Peter Kos | 1985-07-09 |
| 4462908 | Rake lifting means for sedimentation apparatus | Stephen Landsman | 1984-07-31 |
| 4303492 | Electrode assembly | Mark P. Freeman, William A. Salancy | 1981-12-01 |