Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889703 | Process for producing tungstosilicic acid | Kenneth T. Reilly, Henry E. Hoffman | 1989-12-26 |
| 4816069 | Method for converting cobalt to cobalt metal powder | Martin B. MacInnis, Clarence D. Vanderpool | 1989-03-28 |