Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6784960 | Liquid crystal display device, compensator layer and method of manufacturing a retardation foil | Peter Van De Witte, Rifat Ata Mustafa Hikmet, Dirk Jan Broer | 2004-08-31 |
| 6193937 | Apparatus for manufacturing a broadband cholesteric polarizer | Dirk Jan Broer | 2001-02-27 |
| 5978055 | Compensator, liquid crystal display device and retardation foil | Peter Van De Witte, Dirk Jan Broer, Sjoerd Stallinga | 1999-11-02 |
| 5948831 | Method for manufacturing a broadband cholesteric polarizer | Dirk Jan Broer | 1999-09-07 |
| 5855986 | Liquid crystal display device and retardation foil | Dirk Jan Broer | 1999-01-05 |
| 5825444 | Illumination system using cholesteric polarizer, linear polarizer for such illumination system and display device comprising such as illumination system | Dirk Jan Broer, Grietje N. Mol, Frans Leenhouts | 1998-10-20 |
| 5798808 | Liquid crystal display device having a cholesteric order with a pitch of helix less than 0.25 microns and a retardation foil | Dirk Jan Broer, Frans Leenhouts | 1998-08-25 |
| 5737044 | Illumination system using a broadband cholesteric polarizer having its surface of maximum helix pitch face the radiation source | Dirk Jan Broer | 1998-04-07 |
| 5688566 | Liquid crystal display device | Dirk Jan Broer | 1997-11-18 |
| 5404236 | Display device with crossing electrodes with specific ratio for gray scale | Wilbert J. A. M. Hartmann, Antonius G. H. Verhulst | 1995-04-04 |
| 5347393 | Electro-optical display device with sub-electrodes | Franciscus J. J. Blommaert, Antonius G. H. Verhulst | 1994-09-13 |
| 5208689 | Electro-optic display device with increased number of transmission levels | Wilbert J. A. M. Hartmann, Leonard J. M. Esser, Antonius G. H. Verhulst | 1993-05-04 |