Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464865 | Wastewater dispersal system | Douglas E. Fessel | 2002-10-15 |
| 6413427 | Nitrogen reduction wastewater treatment system | Douglas E. Fessel | 2002-07-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6464865 | Wastewater dispersal system | Douglas E. Fessel | 2002-10-15 |
| 6413427 | Nitrogen reduction wastewater treatment system | Douglas E. Fessel | 2002-07-02 |