Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362872 | Chromogenic lactams | Hans-Peter Baumann | 1994-11-08 |
| 5210232 | Pyran-containing phthalides | — | 1993-05-11 |
| 5162544 | Indoline-containing phthalides | — | 1992-11-10 |
| 5097044 | Pyran-containing phthalides | — | 1992-03-17 |
| 5071986 | Chromogenic phthalides and azaphthalides | Davor Bedekovic | 1991-12-10 |
| 5024988 | Pressure-or heat-sensitive recording material | Rudolf Zink | 1991-06-18 |
| 5013707 | Pressure- or heat-sensitive recording material | Rudolf Zink | 1991-05-07 |
| 5004813 | Chromogenic phthalides and azaphthalides | Davor Bedekovic | 1991-04-02 |
| 4920220 | Chromogenic 1-heterocyclic substituted 2,4-benzoxazines | — | 1990-04-24 |
| 4876357 | Chromogenic phthalides and azaphthalides | Davor Bedekovic | 1989-10-24 |