Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5378260 | Two-zone countercurrent smelter system and process | Richard J. Fruehan, John F. Elliott, deceased | 1995-01-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5378260 | Two-zone countercurrent smelter system and process | Richard J. Fruehan, John F. Elliott, deceased | 1995-01-03 |