Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4374340 | Low pressure discharge lamp | Petrus C. Lauwerijssen | 1983-02-15 |
| 4277720 | Low-pressure mercury vapor discharge lamp | Winston Donald Couwenberg, Franciscus A. S. Ligthart, Jean J. Heuvelmans | 1981-07-07 |