Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887492 | Method for making low alpha count lead | John A. Dunlop, Edward F. G. Milner, Robert W. Smyth | 1989-12-19 |
| 4820340 | Method for slag fuming and reduction | Gregory G. Richards, Steven L. Cockcroft, James K. Brimacombe | 1989-04-11 |