Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4669667 | Nozzle for spraying a liquid into a vessel opening | Haywood A. Perkins | 1987-06-02 |
| 4562048 | Process for the treatment of metal-bearing ores | Oliver W. Moles, Haywood A. Perkins | 1985-12-31 |