Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6060831 | Discharge lamp with specific fill and luminescent layers | Dick Van Der Voort, Franciscus A. S. Ligthart | 2000-05-09 |
| 6051922 | Electrodeless low-pressure mercury vapour discharge lamp employing a high frequency magnetic field having a layer of aluminum oxide particles | Jakob Schlejen, Johannes J. M. Buck | 2000-04-18 |
| 5825125 | Neon discharge lamp | Franciscus A. S. Ligthart, Rolf De Man, Dick Van Der Voort | 1998-10-20 |
| 5801482 | Low-pressure mercury vapor discharge lamp | Henricus C. G. Verhaar, Henriette Jacoba Talen-Van Der Mheen, Wilhelmus M. P. Van Kemenade | 1998-09-01 |
| 5753999 | Low-pressure mercury vapour discharge lamp | Henricus C. G. Verhaar | 1998-05-19 |
| 5070273 | Low-pressure mercury vapor discharge lamp with flat discharge vessel and external side electrodes | Willem Johannes Van Den Bogert, Markus W. M. Wanninkhof | 1991-12-03 |