Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6820994 | Lighting device, and electronic device using the same | Osamu Yokoyama | 2004-11-23 |
| 6742907 | Illumination device and display device using it | Osamu Yokoyama, Satoru Miyashita, Kanemitsu Kubota | 2004-06-01 |