Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5907437 | Converging optics for a single light valve full-color projector | Donald E. Sprotbery | 1999-05-25 |
| 5363222 | Compact optical system for a single light valve full-color projector | — | 1994-11-08 |
| 5170250 | Full-color light valve projection apparatus having internal image registration system | — | 1992-12-08 |
| 5111315 | Optical system for illuminating a light valve | — | 1992-05-05 |
| 4911547 | Compact optical system for a single light valve projector using two axes of polarization | — | 1990-03-27 |
| 4842374 | Unitary prepolarizing prism assembly for a four color liquid crystal light valve image projector | — | 1989-06-27 |
| 4836649 | Optical layout for a three light valve full-color projector employing a dual relay lens system and a single projection lens | Donald E. Sprothbery | 1989-06-06 |
| 4826311 | Prism assembly with three periscopes and projection lenses for a single light valve full-color projector | — | 1989-05-02 |
| 4826293 | Electron beam addressed liquid crystal light valve with input sheet conductor | Jan Grinberg, Nubuo J. Koda, Philip G. Reif, William P. Bleha, Jr., Murray S. Welkowsky | 1989-05-02 |
| 4824214 | Unitary prepolarizing prism assembly for a four color liquid crystal light valve image projector | — | 1989-04-25 |
| 4786146 | Color sequential illumination system for a liquid crystal light valve | — | 1988-11-22 |
| 4749259 | Liquid crystal image projection with multicolor prepolarizing system | — | 1988-06-07 |
| 4728174 | Electron beam addressed liquid crystal light valve | Jan Grinberg, Nobuo J. Koda, Phillip G. Reif, William P. Bleha, Jr., Murray S. Welkowsky | 1988-03-01 |
| 4690526 | Prism assembly for a single light valve full-color projector | — | 1987-09-01 |
| 4687301 | Full-color projector system with a tricolor-separating prism | — | 1987-08-18 |