Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5885076 | Method and system for removing mercury from dental waste water | Stephen Alden Ralls, Ernest David Pederson | 1999-03-23 |
| 5795159 | Mercury removal method and apparatus | Stephen Alden Ralls | 1998-08-18 |