Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6204598 | Electric incandescent lamp with sintered glass plate | Ursula Bruggemann, Wilfried L. Kohlmann, Jacques M.J. Geboers | 2001-03-20 |
| 6140769 | Electric incandescent lamp with sintered body glass plate | Ursula Bruggemann, Wilfried L. Kohlmann, Jacques M.J. Geboers | 2000-10-31 |
| 5947587 | Signal lamp with LEDs | Matthijs Keuper | 1999-09-07 |
| 5735595 | Low pressure rare gas discharge lamp signalling system | Paulus Q. J. Nederpel | 1998-04-07 |
| D302472 | Compact fluorescent reflector lamp | Wallace T. MacDonald, Robert E. Cassidy, Harish F. Gandhi, Frederik H. Alkema | 1989-07-25 |
| 4506185 | Electric reflector lamp | Henricus F. J. I. Giller, Bauke J. Roelevink | 1985-03-19 |