Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861142 | Projection type liquid crystal displaying device | Sakae Tanaka, Tadahiko Yamaoka, Shingo Takahashi | 1989-08-29 |
| 4796978 | Projection type liquid crystal displaying device | Sakae Tanaka, Tadahiko Yamaoka, Shingo Takahashi | 1989-01-10 |