Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6468325 | Method of making phosphate-based ceramic filters | Gregory Albert Merkel | 2002-10-22 |
| 6464744 | Diesel particulate filters | David L. Hickman | 2002-10-15 |
| 6454941 | Gravity-flow water filtration device | David L. Hickman, Stanley D. Solsky | 2002-09-24 |
| 6405875 | Water filtration device and method | — | 2002-06-18 |