Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4737351 | Process for the recovery of tin | Wolfgang Krajewski | 1988-04-12 |
| 4666686 | Process for the fluid-fluid extraction of gallium, germanium or indium from liquid solutions | Wolfang Krajewski | 1987-05-19 |