Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6649758 | Preparation of trans-thiazineindigo pigments | Leonhard Unverdorben, Bruno Piastra | 2003-11-18 |
| 5904739 | Storage-stable liquid brightener formulations | Thomas Martini | 1999-05-18 |