Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816069 | Method for converting cobalt to cobalt metal powder | Alan D. Douglas, Clarence D. Vanderpool | 1989-03-28 |
| 4808384 | Recovery of tungsten, scandium, iron, and manganese from tungsten bearing material | Clarence D. Vanderpool, Judith A. Ladd, Mary A. Fedorchak | 1989-02-28 |