Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4334004 | Light-sensitive diazotype material with 2-hydroxy-3-naphthoic acid amides having 6-sulfonic acid amide substitution | — | 1982-06-08 |
| 4321373 | 2-Hydroxy-3-naphthoic acid amides | — | 1982-03-23 |
| 4317875 | Recording material containing diazo compounds and process for the manufacture thereof | Klaus Thoese | 1982-03-02 |