Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7538058 | Sintered body and electric lamp | Franciscus Leonardus Gerardus Vries | 2009-05-26 |
| 5742124 | High-pressure discharge lamp | Martinus J.M. Kessels, Fransiscus H. Van Lierop | 1998-04-21 |