Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4806816 | High-pressure discharge lamp | — | 1989-02-21 |
| 4760501 | Headlamp system | — | 1988-07-26 |
| 4594529 | Metal halide discharge lamp | — | 1986-06-10 |
| 4331901 | Electric incandescent lamp | Leonard C. H. Eijkelenboom, Jan de Ridder | 1982-05-25 |
| 4319157 | High pressure mercury vapor discharge lamp | — | 1982-03-09 |