Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888201 | Method of manufacturing a diffuse reflector | Hendrik Veenvliet, Maarten J. Verkerk, Arnold H. Witjes | 1989-12-19 |
| 4807967 | Passive display device | Hendrik Veenvliet, Antonius G. H. Verhulst | 1989-02-28 |