Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4474611 | Arrangement of busbars for electrolytic reduction cells | Otto Knaisch, Hans Pfister | 1984-10-02 |
| 4397728 | Device for conducting electric current between electrolytic cells | Hans Pfister, Otto Knaisch | 1983-08-09 |
| 4359377 | Busbar arrangement for electrolytic cells | Hans Pfister | 1982-11-16 |
| 4313811 | Arrangement of busbars for electrolytic cells | — | 1982-02-02 |
| 4261807 | Asymmetrical arrangement of busbars for electrolytic cells | — | 1981-04-14 |