Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826144 | Optical recording medium, optical recording and/or reproducing method, and optical recording and/or reproducing system | Akira Kikitsu, Toshihiko Nagase | 2004-11-30 |
| 6805935 | Optical recording medium | Sumio Ashida, Keiichiro Yusu, Naomasa Nakamura, Noritake Ohmachi | 2004-10-19 |
| 6750469 | Phase change nonvolatile storage device and drive circuit | Hiroaki Yoda | 2004-06-15 |
| 6744717 | Optical disk and optical disk drive | Akiko Hirao, Hideyuki Nishizawa, Toshihiko Nagase | 2004-06-01 |
| 6741524 | Thermally-assisted magnetic recording and reproducing device having an electron beam thermal source | Junichi Akiyama, Akira Kikitsu, Tsutomu Tanaka, Kuniyoshi Tanaka | 2004-05-25 |
| 6738335 | Optical recording medium, reproducing method, and reproducing apparatus | Kenji Todori, Toshihiko Nagase | 2004-05-18 |
| 6636460 | Thermally-assisted magnetic recording method and thermally-assisted magnetic recorder | Junichi Akiyama, Akira Kikitsu | 2003-10-21 |
| 6606291 | Optical disk and optical disk drive | Akiko Hirao, Hideyuki Nishizawa, Toshihiko Nagase | 2003-08-12 |
| 6602620 | Magnetic recording apparatus, magnetic recording medium and manufacturing method thereof | Akira Kikitsu | 2003-08-05 |
| 6554972 | Information recording medium and its manufacturing method | Sumio Ashida, Keiichiro Yusu, Toshihiko Nagase, Naomasa Nakamura | 2003-04-29 |
| 6500598 | Multilevel phase change optical recording medium | — | 2002-12-31 |
| 6493164 | Magnetic recording apparatus and method of magnetic recording | Akira Kikitsu | 2002-12-10 |
| 6396792 | Recording method of a phase change optical recording medium and recording apparatus | — | 2002-05-28 |
| 6385162 | Optical disk | Toshihiko Nagase | 2002-05-07 |
| 6339582 | Optical disk and recording/reproducing method thereof | Toshihiko Nagase | 2002-01-15 |
| 6296915 | Optical recording medium | Keiichiro Yusu, Sumio Ashida, Akira Kikitsu, Toshihiko Nagase, Naomasa Nakamura +2 more | 2001-10-02 |
| 6240060 | Phase change optical recording medium | Akira Kikitsu, Sumio Ashida, Keiichiro Yusu | 2001-05-29 |
| 6212025 | Magnetic recording and reproducing method and apparatus employing a magnetically continuous magnetic film | Tsutomu Tanaka | 2001-04-03 |
| 6187406 | Optical disk and optical disk drive | Akiko Hirao, Hideyuki Nishizawa, Toshihiko Nagase | 2001-02-13 |
| 6181650 | Optical disk drive and super-resolution reproduction method for optical disk | — | 2001-01-30 |
| 6174597 | Magnetic recording apparatus | Keiichiro Yusu, Hideo Ogiwara, Akira Kikitsu, Futoshi Nakamura | 2001-01-16 |
| 6154440 | Optical disc | — | 2000-11-28 |
| 6114056 | Magnetic element, and magnetic head and magnetic memory device using thereof | Koichiro Inomata, Yoshiaki Saito, Keiichiro Yusu, Hideo Ogiwara | 2000-09-05 |
| 6077406 | Sputtering system | Takashi Kawakubo, Kenya Sano, Ryoichi Ohara | 2000-06-20 |
| 6033536 | Magnetron sputtering method and sputtering target | Kohichi Tateyama, Ryo Sakai, Takashi Ishigami | 2000-03-07 |