Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11883764 | Sludge withdrawal mechanism for wasting and returning settled sludge from secondary clarifier with granular sludge | Jeffrey P Germait, GOVARDHAN R. KATTA, Allen Lepak | 2024-01-30 |
| 4975197 | Orbal wastewater treatment process | John W. Wittmann, George W. Smith | 1990-12-04 |
| 4961854 | Activated sludge wastewater treatment process | John W. Wittmann, George W. Smith | 1990-10-09 |