Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6733670 | Apparatus and method for rehabilitating a traveling bridge filter underdrain | — | 2004-05-11 |
| 6048132 | Filter underdrain with prefabricated cells | Joseph A. Kupke, John F. Pfeifer, Jr. | 2000-04-11 |
| 5891335 | Filtration system with traveling plenum | — | 1999-04-06 |
| 5234600 | Apparatus and method for automatically controlling the permeability of a traveling bridge filter system | — | 1993-08-10 |