Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4893900 | Method of altering reflectivity of optical elements | Paul F. Robusto, Chan Hong Wang, John C. Hamacher | 1990-01-16 |
| 4191456 | Optical block for high brightness full color video projection system | Byung-Seop Hong, Joseph H. Colles, Stephen Purdy, Stephen J. Reinsch | 1980-03-04 |