Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886889 | Process for recovery of an amino acid from aqueous mixtures thereof | Phillip L. Mattison, Ronald P. Wirth, Leroy O. Krbechek | 1989-12-12 |
| 4814007 | Recovery of precious metals | Wilson L. Lin, Phillip L. Mattison | 1989-03-21 |