Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695911 | Optical recording medium | Hisato Itoh, Akio Karasawa, Kenichi Sugimoto, Takahisa Oguchi | 1997-12-09 |
| 5633106 | Optical recording media and a method of recording and reproducing information | Hideki Umehara, Masatoshi Yanagimachi, Yoshiteru Taniguchi, Sumio Hirose | 1997-05-27 |