Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889655 | Mixtures of fluorescent whitening agents | Heinz Hefti, Kurt Weber, Kurt Burdeska, Dieter Reinehr | 1989-12-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889655 | Mixtures of fluorescent whitening agents | Heinz Hefti, Kurt Weber, Kurt Burdeska, Dieter Reinehr | 1989-12-26 |