Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6645298 | Active substance and device for the deacidification of printed matter | Christian Herren | 2003-11-11 |
| 5184499 | Testing device with acceleration tube | Erich Oppliger | 1993-02-09 |
| 4942775 | Method of and device for accelerating test pieces on a circular path | Erich Oppliger | 1990-07-24 |