Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4647812 | Display tube having a display window with an interference filter | Leendert Vriens, Johannes H. M. Spruit, Johannes C. N. Rijpers | 1987-03-03 |
| 4634926 | Display tube provided with an interference filter | Leendert Vriens, Johannes H. M. Spruit, Johannes C. N. Rijpers | 1987-01-06 |