Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6806640 | Organic electroluminescence device having current injection layer between light emitting layer and cathode | Hiroyuki Okada, Shigeru Tabatake, Shigeki Naka | 2004-10-19 |
| 6756249 | Method of manufacturing organic electroluminescent device | Shigeki Naka, Tadahiro Echigo, Hiroyuki Okada | 2004-06-29 |
| 6710549 | Driving method for matrix type organic EL element and matrix type organic EL apparatus | Hiroyuki Okada, Shigeki Naka | 2004-03-23 |