Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4957349 | Active matrix screen for the color display of television pictures, control system and process for producing said screen | Jean-Frederic Clerc | 1990-09-18 |
| 4889412 | Liquid crystal cell using the electrically controlled birefringence effect and a uniaxial medium of negative optical anisotropy usable therein | Jean-Frederic Clerc, Pierre Vaudaine, Sylvie Vey | 1989-12-26 |
| 4870263 | Device for determining the contrast of a display screen as a function of the observation direction | — | 1989-09-26 |
| 4813770 | Cell with a double liquid crystal layer using the electrically controlled birefringence effect and process for producing a uniaxial medium with negative optical anisotropy usable in said cell | Jean-Frederic Clerc, Aime Perrin | 1989-03-21 |
| 4701028 | Liquid crystal cell which can have a homeotropic structure with compensated birefringence of said structure | Jean-Frederic Clerc | 1987-10-20 |
| 4330813 | Illuminating device for large screen | — | 1982-05-18 |