Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5718827 | Paper filter for removing metal cations | Theodore B. Rydell, Joseph D. Wahlquist | 1998-02-17 |
| 5554288 | Disposable filters and manufacturing process | Theodore B. Rydell, Joseph D. Wahlquist | 1996-09-10 |