Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4462832 | Less abrasive pigment or printing ink, and method of reducing abrasion caused by pigments and printing inks | Werner Jettmar, Hans Olschner | 1984-07-31 |
| 4229343 | Azo dyes from an oxadiazolyl-substituted aniline | Walter Kurtz, Peter Dimroth, Hans Scherer | 1980-10-21 |