Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349231 | Chisel alignment unit for a crust breaking facility | Edwin Gut, Gottfried Maugweiler, Hans R. Friedli | 1982-09-14 |
| 4332660 | Storage bunker device for feeding electrolytic cell | Hans R. Friedli | 1982-06-01 |
| 4317595 | Chisel for a crust breaking facility | Edwin Gut, Hans R. Friedli | 1982-03-02 |