Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6184618 | Luminescent material | Thomas Justel, Hans Nikol, Cornelis Reinder Ronda | 2001-02-06 |
| 5677598 | Low-pressure mercury discharge lamp with color temperature adjustment | Lukas Kastelein | 1997-10-14 |
| 5669510 | Method and device for selecting low-pressure murcury discharge lamps | Petrus C. Lauwerijssen, Lukas Kastelein, Henricus C. G. Verhaar | 1997-09-23 |
| 5097176 | High-pressure sodium discharge lamp having a color temperature of at least 2800.degree. K. | Johannes H. M. Van Der Sande, Robertus A. J. Keijser, Monique M. F. Eerdekens | 1992-03-17 |
| 4800319 | Low-pressure mercury vapor discharge lamp | Johannes Trudo Cornelis Van Kemenade, Everhardus G. Berns | 1989-01-24 |
| 4644223 | Low-pressure mercury vapor discharge lamp | Johannes Trudo Cornelis Van Kemenade, Everhardus G. Berns | 1987-02-17 |
| 4602188 | Low-pressure mercury vapor discharge lamp | Johannes Trudo Cornelis Van Kemenade, Everhardus G. Berns | 1986-07-22 |
| 4215289 | Luminescent material, luminescent screen provided with such a material and low-pressure mercury vapor discharge lamp provided with such a screen | Gert M. Boogerd | 1980-07-29 |