Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6830836 | Heterocyclic compounds, materials for light emitting devices and light emitting devices using the same | Hisashi Okada | 2004-12-14 |
| 6824891 | Light-emitting device and material therefor | Hisashi Okada, Masayuki Mishima, Toshiki Taguchi | 2004-11-30 |
| 6818325 | Light-emitting device | Masayuki Mishima, Hisashi Okada, Katsumi Araki, Xuepeng Qiu | 2004-11-16 |
| 6764777 | Sulfur-containing compound and light-emitting device using same | — | 2004-07-20 |