Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6060831 | Discharge lamp with specific fill and luminescent layers | Christianus J. Roozekrans, Dick Van Der Voort | 2000-05-09 |
| 5982089 | Low-pressure mercury discharge meander lamp dimensioned for even illumination and favorable power consumption | Gustaaf A. Wesselink | 1999-11-09 |
| 5907216 | Low-pressure mercury vapour discharge lamp | Willem Johannes Van Den Bogert, Johannes T.J. Van Haastrecht, Renate Kaiser | 1999-05-25 |
| 5825125 | Neon discharge lamp | Rolf De Man, Christianus J. Roozekrans, Dick Van Der Voort | 1998-10-20 |
| 5719465 | Low pressure mercury vapor discharge lamp | Peter M. Den Breeijen, Patricius W. M. Lepelaars | 1998-02-17 |
| 5387837 | Low-pressure discharge lamp and luminaire provided with such a lamp | Bauke J. Roelevink, Paulus Q. J. Nederpel | 1995-02-07 |
| 5239238 | Electrodeless low-pressure mercury vapour discharge lamp | Jozef Reinerus Maria Bergervoet | 1993-08-24 |
| 5233268 | Low-pressure mercury vapor discharge lamp | Jean J. Heuvelmans | 1993-08-03 |
| 4546285 | Low-pressure mercury vapor discharge lamp | Jean J. Heuvelmans, Winston Donald Couwenberg | 1985-10-08 |
| 4335330 | Low-pressure mercury vapor discharge lamp | Robert C. Peters, Louis E. Vrenken, Winston D. Couvbenberg | 1982-06-15 |
| 4277720 | Low-pressure mercury vapor discharge lamp | Winston Donald Couwenberg, Albert Bouwknegt, Jean J. Heuvelmans | 1981-07-07 |