Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695687 | Anhydrous fluorescent whitening agent formulation | Josef Zelger | 1997-12-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695687 | Anhydrous fluorescent whitening agent formulation | Josef Zelger | 1997-12-09 |