Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679146 | Moulding materials and spinning materials containing cellulose | Wolfram Kalt, Heinrich Firgo | 1997-10-21 |
| 5628941 | Process for the production of cellulose moulded bodies | Wolfram Kalt, Heinrich Firgo, Eduard Mulleder, Bruno Mangeng, Arnold Nigsch +2 more | 1997-05-13 |