Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8034237 | Backwashing filter basket | Thomas H. Happel | 2011-10-11 |
| 7981283 | Adjustable filter basket for a storm water drain system | — | 2011-07-19 |
| 7959799 | Street curb filter basket system | Thomas H. Happel | 2011-06-14 |