Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5179312 | Television projection system having frame with integral cooling | Leendert Vriens | 1993-01-12 |
| 4933593 | Liquid-cooled projection television display tube with expansion vessel | Bernardus G. J. Weijers | 1990-06-12 |
| 4899080 | Projection television display tube with cooling means and display device having such a display tube | Leendert Vriens, Willem M. Van Alphen | 1990-02-06 |
| 4762393 | Rear projection screen and rear projection system provided with such a screen | Leendert Vriens, Johannes C. Van De Ven | 1988-08-09 |
| 4363116 | Method, apparatus and record carrier body for optically writing information | Wilhelm J. Kleuters, Johannes J. Verboom | 1982-12-07 |