Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650112 | Process of making cellulose fibers | Stefan Zikeli, Friedrich Ecker | 1997-07-22 |
| 5607639 | Process for the preparation of cellulose sheet | Stefan Zikeli, Friedrich Ecker, Klaus-Christian Renner, Anton Sch onberg | 1997-03-04 |