Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7575683 | Portable wetlands | James H. Welsh, Stephen R. Lyon | 2009-08-18 |
| 6443654 | Hydraulic energy dissipating offset stepped spillway | — | 2002-09-03 |
| 6059490 | Hydraulic energy dissipating offset stepped spillway and methods of constructing and using the same | — | 2000-05-09 |