Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363744 | Mixtures of optical brighteners and their use for the optical brightening | Dieter Gunther, Rudiger Erckel, Gunter Rosch | 1982-12-14 |
| 4336155 | Mixtures of optical brighteners | Thomas Martini, Rudiger Erckel, Horst Fruhbeis, Gunter Rosch | 1982-06-22 |
| 4330427 | Mixtures of optical brighteners | Thomas Martini, Rudiger Erckel, Horst Fruhbeis, Gunter Rosch | 1982-05-18 |