Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5942851 | Low-pressure sodium discharge lamp with specific current supply coatings | Petrus M. G. Van Gennip | 1999-08-24 |
| 5925582 | Glass composition suitable for use in a fluorescent lamp, lamp envelope manufactured from said glass composition and fluorescent lamp provided with a lamp envelope of said glass composition | Gerardus H. A. M. van der Steen | 1999-07-20 |
| 5612263 | Glass composition for a lamp envelope of a black light blue lamp | Henderikus De Vroome | 1997-03-18 |
| 5470805 | Glass composition suitable for use in electric lamps, stem manufactured from this glass composition and fluorescent lamp having a lamp envelope of this glass composition | — | 1995-11-28 |