Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836979 | Manufacture of composite structures | James A. Bell, Thijs Eerkes, William L. Mankins | 1989-06-06 |
| 4830667 | Pyrometallurgical copper refining | Samuel Walton Marcuson, James A. Bell, Haydn Davies, Richard Stratton-Crawley | 1989-05-16 |
| 4802916 | Copper smelting combined with slag cleaning | Grigori S. Victorovich, Charles E. O'Neill, James A. Bell, Lloyd Timberg | 1989-02-07 |
| 4802917 | Copper smelting with calcareous flux | Grigori S. Victorovich, Charles E. O'Neill | 1989-02-07 |