Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4636691 | Arrangement including a metal vapor discharge tube provided with at least two internal electrodes | Rolf De Man, Leo M. Sprengers, Jozef I. C. Peeters | 1987-01-13 |
| 4331901 | Electric incandescent lamp | Bertus de Vrijer, Leonard C. H. Eijkelenboom | 1982-05-25 |