Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694387 | Optical medium having a data pattern for detecting an upside-down insertion, and reproducing apparatus for use therewith | Yasuhiro Gotoh, Yoshihisa Fukushima | 1997-12-02 |
| 5681634 | Optical information medium, and method and apparatus for fabricating the same | Hisaki Miyamoto, Kiyoshi Inoue, Sakae Noda | 1997-10-28 |