Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879645 | Data processing device with high security of stored programs | Masuo Tamada, Hitoshi Kokuryo, Shinsuke Tamura | 1989-11-07 |
| 4796248 | Objective lens drive device | Kouichi Ikebe | 1989-01-03 |