Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880292 | Transmission viewing screen of image projector apparatus | Toshikazu Suzuki, Keijiro Sakamoto, Tetsuo Kyogoku, Masayuki Nino | 1989-11-14 |
| 4865405 | Optical filter | — | 1989-09-12 |