Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6013979 | Phosphor composition with a coating of colloidal SiO.sub.2 particles and an oxygen compound of magnesium, calcium, barium, zinc, or aluminum | Friederike Picht, Michael Bredol, Joachim Opitz | 2000-01-11 |
| 6010779 | Phosphor composition comprising fine-grain and coarse-grain SiO.sub.2 particles | Friederike Picht, Jacqueline Merikhi, Joachim Opitz, Hans-Otto Jungk, Jan W. G. de Bakker +2 more | 2000-01-04 |