Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6270029 | Spiral storage | Albert Dunner, Hans Frei, Werner Gassmann | 2001-08-07 |
| 6246462 | Apparatus for producing photographic copies | Rudolf Ackermann, Albert Dunner, Helmut Lussky | 2001-06-12 |