Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8444538 | Impression roller and use of the same | Franz Knopf, Thomas Litterst | 2013-05-21 |
| 7431897 | Apparatus replacing atmospheric oxygen with an inert gas from a laminar air boundary layer and application of said apparatus | Franz Knopf | 2008-10-07 |