Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650057 | Chloride assisted hydrometallurgical extraction of metal | — | 1997-07-22 |
| 5645708 | Chloride assisted hydrometallurgical copper extraction | — | 1997-07-08 |
| 5592703 | Powered toilet seat lift | George L. Drenner, Jr. | 1997-01-14 |