Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375111 | Optical information recording medium, and audio and video information recording method | Takashi Ishida, Shunji Ohara | 1994-12-20 |
| 5331620 | Recording method and recording apparatus for optical disk | Takashi Ishida, Shunji O'Hara, Kenzo Ishibashi | 1994-07-19 |