Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7074329 | Lid for an underdrain block | David Slack | 2006-07-11 |
| 6261453 | Fluid treatment media support system | — | 2001-07-17 |
| 5039428 | Waste water treatment process using improved recycle of high density sludge | Thomas H. Wentzler, Surendra K. Mishra, Roger N. Kust | 1991-08-13 |