Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4453200 | Apparatus for lighting a passive display | Robert J. Thorkildson | 1984-06-05 |
| 4440474 | Illuminated passive display from an oblique angle | — | 1984-04-03 |
| 4245242 | Contrast enhancement of multicolor displays | — | 1981-01-13 |