Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4451289 | Process for extracting non-ferrous metals from iron-bearing scraps | Luc M. Fontainas | 1984-05-29 |
| 4211754 | Process for the production of a tantalum and niobium bearing concentrate from a tantalum and niobium bearing ferro-alloy | Jean Deweck | 1980-07-08 |