Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805163 | Tracking control unit in information reproducing apparatus | — | 1989-02-14 |
| 4740939 | Apparatus for reproducing information recorded on a disk | Takashi Kimura, Junichi Ikoma | 1988-04-26 |
| 4712218 | Method of and apparatus for driving semiconductor laser | Masahiro Ojima, Akira Arimoto, Naoki Chinone | 1987-12-08 |