Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5844540 | Liquid crystal display with back-light control function | — | 1998-12-01 |
| 5808708 | Lighting apparatus | Hisashi Oyama, Youko Ohta, Kenichi Ukai, Nobuyuki Takahashi, Takayoshi Tanabe | 1998-09-15 |
| 5673128 | Back light device of liquid crystal device | Youko Ohta | 1997-09-30 |