Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804189 | Near field optical recording medium | Toshio Inase, Koyata Takahashi, Koji Katayama, Tatsuo Kawasaki, Kenichi Sekimoto +1 more | 2004-10-12 |
| 6798734 | Optical recording medium having address pits in the header region connecting with each other | Tatsuo Kawasaki, Koyata Takahashi, Kenichi Sekimoto, Shigeru Hiramatsu, Mutsumi Asano +2 more | 2004-09-28 |
| 6791677 | Information measuring apparatus using a fine channel device | Akira Kawai, Koji Katayama, Tomoyuki Oikawa, Keiichiro Nishizawa | 2004-09-14 |