Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804190 | High density phase-change type optical disk having a data efficiency of more than 80 percent | Takashi Ishida, Hiromichi Ishibashi, Mamoru Shoji, Atsushi Nakamura, Shigeru Furumiya | 2004-10-12 |
| 6791926 | Method and device for finding conditions on recording pulse of optical disk | Shigeru Furumiya, Mamoru Shoji | 2004-09-14 |
| 6757239 | Optical disk having wobble patterns and block identification marks | Atsushi Nakamura, Shigeru Furumiya, Hiromichi Ishibashi, Takashi Ishida, Toyoji Gushima | 2004-06-29 |
| 6724708 | Optical disk medium and method and apparatus for reading information | Hiromichi Ishibashi, Shigeru Furumiya, Atsushi Nakamura, Takashi Ishida | 2004-04-20 |
| 6678230 | Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium | Harumitsu Miyashita, Shinichi Konishi, Atsushi Nakamura, Takeshi Nakajima | 2004-01-13 |
| 6674700 | Optical disk having sub-blocks and sub-block indentification marks | Atsushi Nakamura, Shigeru Furumiya, Hiromichi Ishibashi, Takashi Ishida, Toyoji Gushima | 2004-01-06 |