Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363712 | Device for galvanic precipitation of aluminum | Siegfried Birkle, Klaus Stoeger | 1982-12-14 |
| 4360409 | Apparatus for the galvanic deposition of aluminum | Klaus Stoeger, Siegfried Birkle | 1982-11-23 |
| 4192849 | Pressure digester | Egmont Scheubeck | 1980-03-11 |