Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4975197 | Orbal wastewater treatment process | Donald J. Thiel, George W. Smith | 1990-12-04 |
| 4961854 | Activated sludge wastewater treatment process | Donald J. Thiel, George W. Smith | 1990-10-09 |
| 4663038 | Side channel clarifier | George W. Smith | 1987-05-05 |
| 4563282 | Wastewater treatment plant and method | Robert C. Winkelman, Douglas F. Mooers, Richard Davie | 1986-01-07 |