Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5240897 | Heat-sensitive recording material | Rudolf Zink | 1993-08-31 |
| 4921535 | Heat-sensitive recording material | Hermann Nachbur | 1990-05-01 |
| 4513302 | Pressure-sensitive or heat-sensitive recording material | — | 1985-04-23 |