Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9946153 | Mask blank and transfer mask | Masafumi Ishiyama | 2018-04-17 |
| 9470971 | Mask blank, transfer mask, and methods of manufacturing the same | Masafumi Ishiyama | 2016-10-18 |
| 9349404 | Perpendicular magnetic recording disc | Kazuaki Sakamoto | 2016-05-24 |
| 9240204 | Perpendicular magnetic recording disc | Takenori Kajiwara, Tokichiro Sato | 2016-01-19 |
| 9159351 | Perpendicular magnetic recording medium and method of manufacturing the same | Kazuaki Sakamoto, Kong-Kyeom Kim, Takahiro Onoue, Masafumi Ishiyama, Kenji Ayama | 2015-10-13 |
| 9064518 | Perpendicular magnetic recording medium | Takahiro Onoue | 2015-06-23 |
| 9005699 | Method for manufacturing magnetic recording medium | Yoshiaki Sonobe, Koichi Wago | 2015-04-14 |
| 8871368 | Perpendicular magnetic recording medium and process for manufacture thereof | Takahiro Onoue, Toshiaki Tachibana, Masafumi Ishiyama | 2014-10-28 |
| 8795857 | Perpendicular magnetic recording medium and manufacturing method of the same | Kenji Ayama, Tokichiro Sato, Masafumi Ishiyama | 2014-08-05 |
| 8697261 | Perpendicular magnetic recording medium | — | 2014-04-15 |
| 8623528 | Method of manufacturing perpendicular magnetic recording medium and perpendicular magnetic recording medium | Masafumi Ishiyama, Tokichiro Sato, Kenji Ayama, Takahiro Onoue, Junichi Horikawa | 2014-01-07 |
| 8603650 | Perpendicular magnetic recording disk and manufacturing method thereof | Yoshiaki Sonobe, Chikara Takasu | 2013-12-10 |
| 8546000 | Perpendicular magnetic disc | — | 2013-10-01 |
| 8367228 | Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording medium | Yoshiaki Sonobe, Koichi Wago | 2013-02-05 |
| 8309239 | Perpendicular magnetic recording medium and method of manufacturing the same | Masafumi Ishiyama, Kenji Ayama, Tokichiro Sato | 2012-11-13 |
| 8142916 | Magnetic recording medium | Masafumi Ishiyama, Kenji Ayama, Tokichiro Sato | 2012-03-27 |
| 8057926 | Perpendicular magnetic recording medium | Kenji Ayama, Tokichiro Sato, Masafumi Ishiyama, Junichi Horikawa | 2011-11-15 |
| 8003237 | Perpendicular magnetic recording disk and manufacturing method thereof | Yoshiaki Sonobe, Kong-Kyeom Kim, Masaki Uemura | 2011-08-23 |
| 7983003 | Magnetic recording medium having soft magnetic layer and perpendicular magnetic recording layer | Yoshiaki Sonobe, Shinichi Ishibashi, Masato Kobayashi | 2011-07-19 |
| 7955723 | Magnetic recording medium substrate and perpendicular magnetic recording medium | Yoshiaki Sonobe, Kong-Kyeom Kim | 2011-06-07 |
| 7833639 | Magnetic recording medium and method for manufacturing magnetic recording medium | Yoshiaki Sonobe, Koichi Wago | 2010-11-16 |
| 7420886 | Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording medium | Hiroshi Tomiyasu, Genshichi Hata, Takashi Morikawa, Masato Kobayashi, Masashi Suzuki +2 more | 2008-09-02 |
| 7220500 | Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording medium | Hiroshi Tomiyasu, Genshichi Hata, Takashi Morikawa, Masato Kobayashi, Masashi Suzuki +2 more | 2007-05-22 |
| 7208236 | Magnetic recording medium with multi-portion carbon-based protection layer, and apparatus thereof | Takashi Morikawa, Hiroshi Tomiyasu, Masafumi Ishiyama | 2007-04-24 |
| 7169487 | Magnetic recording medium | Hisao Kawai, Hirotaka Tanaka, Masaki Uemura | 2007-01-30 |