Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834850 | Efficient electrolytic precious metal recovery system | Vittorio de Nora, Robert D. Penny, Lawrence L. Frank, James J. Stewart | 1989-05-30 |
| 4822509 | Highly magnetic iron oxide powder | Jeries I. Bishara, Eric J. Rudd | 1989-04-18 |