Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365504 | Optical disk apparatus, and construction of optical disk | — | 1994-11-15 |
| 5309423 | Magneto-optical reproducing device with optical system having two reflective elements and providing phase difference cancellation | Isao Okuda, Suguru Takishima | 1994-05-03 |
| 5278401 | Optical disc apparatus having five light receiving areas for detecting focus error and tracking error | Suguru Takishima, Isao Okuda, Masahiro Oono, Koichi Maruyama | 1994-01-11 |