Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5081155 | Hydroxy aromatic ketones | Leroy O. Krbechek | 1992-01-14 |
| 4992200 | Recovery of precious metals | Phillip L. Mattison, Michael J. Virnig | 1991-02-12 |
| 4895597 | Recovery of precious metals | Phillip L. Mattison, Michael J. Virnig | 1990-01-23 |
| 4814007 | Recovery of precious metals | Phillip L. Mattison, Michael J. Virnig | 1989-03-21 |