Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6458474 | Methine compound, material for organic luminescence element, organic luminescence element using the same | Hisashi Okada | 2002-10-01 |
| 6440586 | Benzopyran compound, material for luminous device, and luminous device using the same | Hisashi Okada, Tatsuya Igarashi | 2002-08-27 |