Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5657168 | Optical system of optical information recording/ reproducing apparatus | Koichi Maruyama | 1997-08-12 |
| 5657171 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-08-12 |
| 5644437 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-07-01 |
| 5638221 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-06-10 |