Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6491397 | Illumination optical system and projector using the same | Hidemasa Yamakawa, Koichi Akiyama | 2002-12-10 |
| 6487175 | Control of power supply to subcribers in digital switch board with respect to data-communication calls | — | 2002-11-26 |
| 6373616 | Optical modulation device and projector | Nobuo Watanabe, Hiromi Saito, Shigeo Toda | 2002-04-16 |