Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4554058 | Electrolytic production of precious metals | Kenneth P. V. Lei, Judith A. Eisele | 1985-11-19 |
| 4256705 | Leaching agglomerated gold - silver ores | Harold J. Heinen, Roald E. Lindstrom | 1981-03-17 |
| 4256706 | Leaching agglomerated gold - silver ores | Harold J. Heinen, Roald E. Lindstrom | 1981-03-17 |