Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8634287 | Method for manufacturing read-only optical disc medium and read-only optical disc medium | Tetsuhiro Sakamoto, Jun Nakano, Etsuo Shibasaki, Hideo Kawachi | 2014-01-21 |
| 7969855 | Read-only optical disc medium and method of fabricating the same | — | 2011-06-28 |
| 7911929 | Optical disk read only memory | Tetsuhiro Sakamoto, Jun Nakano, Hideo Kawachi, Yoshitake Yanagisawa, Makoto Tsukahara +1 more | 2011-03-22 |
| 6541748 | Optical disk checkup/measuring apparatus | — | 2003-04-01 |
| 5495456 | Magneto-optical recording and reproducing apparatus having a laser driving circuit which superimposes a signal having a frequency at least double the maximum recording signal frequency | Nobuyuki Oka | 1996-02-27 |