Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9159351 | Perpendicular magnetic recording medium and method of manufacturing the same | Kazuaki Sakamoto, Kong-Kyeom Kim, Takahiro Onoue, Masafumi Ishiyama, Teiichiro Umezawa | 2015-10-13 |
| 8795857 | Perpendicular magnetic recording medium and manufacturing method of the same | Tokichiro Sato, Teiichiro Umezawa, Masafumi Ishiyama | 2014-08-05 |
| 8623528 | Method of manufacturing perpendicular magnetic recording medium and perpendicular magnetic recording medium | Teiichiro Umezawa, Masafumi Ishiyama, Tokichiro Sato, Takahiro Onoue, Junichi Horikawa | 2014-01-07 |
| 8383209 | Magnetic recording medium manufacturing method and laminate manufacturing method | — | 2013-02-26 |
| 8309239 | Perpendicular magnetic recording medium and method of manufacturing the same | Teiichiro Umezawa, Masafumi Ishiyama, Tokichiro Sato | 2012-11-13 |
| 8142916 | Magnetic recording medium | Teiichiro Umezawa, Masafumi Ishiyama, Tokichiro Sato | 2012-03-27 |
| 8092931 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk | Masafumi Ishiyama | 2012-01-10 |
| 8057926 | Perpendicular magnetic recording medium | Tokichiro Sato, Teiichiro Umezawa, Masafumi Ishiyama, Junichi Horikawa | 2011-11-15 |
| 7537846 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk | Masafumi Ishiyama | 2009-05-26 |
| 6759138 | Antiferromagnetically coupled magnetic recording medium with dual-layered upper magnetic layer | Hiroshi Tomiyasu, Keiji Moroishi, Teiichiro Umezawa | 2004-07-06 |
| 6670055 | Magnetic recording medium and manufacturing method therefor | Hiroshi Tomiyasu, Junichi Horikawa, Teiichiro Umezawa, Tomotaka Yokoyama | 2003-12-30 |