Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6440588 | Nitrogen-containing heterocyclic compound and electroluminescent device | Masaru Matsuoka, Koushi Fukunishi, Kazuko Shirai, Koichi Takagi | 2002-08-27 |
| 6399226 | Material for organic electroluminescence device and method for producing the same | Hiroshi Fukumura | 2002-06-04 |