Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6190568 | Method for retrofitting a false bottom underdrain filter system | — | 2001-02-20 |
| 6143188 | Underdrain block for filter media system | Steven Mark Jantsch, Sr. | 2000-11-07 |
| 6110366 | Anchor for an underdrain block | Paul A. Knauff | 2000-08-29 |