Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5420259 | Tryptanthrine derivatives | Guenther Seybold, Gerhard Wagenblast | 1995-05-30 |
| 4966983 | Benzopyrans for use in recording systems | Udo Mayer, Andreas Oberlinner | 1990-10-30 |
| 4958021 | Benzopyran derivatives | Udo Mayer, Andreas Oberlinner | 1990-09-18 |
| 4841050 | Carbazole containing benzopyrans | Udo Mayer, Andreas Oberlinner | 1989-06-20 |