Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5665503 | Positive charge type organic photoconductive layer | Sei Tsunoda, Toshio Kobayashi, Kikuo Hayama, Hiromi Yamada | 1997-09-09 |
| 5038186 | Light emitting diode array | Takafumi Nishioka | 1991-08-06 |