Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6541899 | Discharged lamp with multiple electron emissive electrode bodies | Marco Haverlag, Jean J. Heuvelmans, John Fitzgerald | 2003-04-01 |
| 6137225 | Low-pressure discharge lamp with filament having protective coating | Jean J. Heuvelmans | 2000-10-24 |
| 5675214 | Low-pressure discharge lamp having hollow electrodes | Jeroen Langevoort, Henricus Lambertus Antonius Adrianus Vogels, Patricius W. M. Lepelaars, Hui-Meng Chow | 1997-10-07 |
| 5424609 | High-pressure discharge lamp | Max L. P. Renardus, Peter A. Seinen, Jan A. J. Stoffels, Christoffel Wijenberg, Harald R. Dielis | 1995-06-13 |
| 4935667 | High-pressure sodium discharge lamp comprising a discharge arc shielding means | Antonius J. G. C. Driessen | 1990-06-19 |
| 4621216 | High-pressure discharge lamp with shielded electrode | Johan Liebe, Antonius J. G. C. Driessen, Jan R. deBie | 1986-11-04 |