Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9946153 | Mask blank and transfer mask | Teiichiro Umezawa | 2018-04-17 |
| 9470971 | Mask blank, transfer mask, and methods of manufacturing the same | Teiichiro Umezawa | 2016-10-18 |
| 9159351 | Perpendicular magnetic recording medium and method of manufacturing the same | Kazuaki Sakamoto, Kong-Kyeom Kim, Takahiro Onoue, Teiichiro Umezawa, Kenji Ayama | 2015-10-13 |
| 8871368 | Perpendicular magnetic recording medium and process for manufacture thereof | Takahiro Onoue, Teiichiro Umezawa, Toshiaki Tachibana | 2014-10-28 |
| 8795857 | Perpendicular magnetic recording medium and manufacturing method of the same | Kenji Ayama, Tokichiro Sato, Teiichiro Umezawa | 2014-08-05 |
| 8709532 | Magnetic disk and manufacturing method thereof | — | 2014-04-29 |
| 8623528 | Method of manufacturing perpendicular magnetic recording medium and perpendicular magnetic recording medium | Teiichiro Umezawa, Tokichiro Sato, Kenji Ayama, Takahiro Onoue, Junichi Horikawa | 2014-01-07 |
| 8425975 | Magnetic disk and magnetic disk manufacturing method | — | 2013-04-23 |
| 8309239 | Perpendicular magnetic recording medium and method of manufacturing the same | Teiichiro Umezawa, Kenji Ayama, Tokichiro Sato | 2012-11-13 |
| 8142916 | Magnetic recording medium | Teiichiro Umezawa, Kenji Ayama, Tokichiro Sato | 2012-03-27 |
| 8092931 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk | Kenji Ayama | 2012-01-10 |
| 8057926 | Perpendicular magnetic recording medium | Kenji Ayama, Tokichiro Sato, Teiichiro Umezawa, Junichi Horikawa | 2011-11-15 |
| 7736768 | Magnetic disk and manufacturing method thereof | — | 2010-06-15 |
| 7722968 | Magnetic disk and manufacturing method thereof | — | 2010-05-25 |
| 7695833 | Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof | — | 2010-04-13 |
| 7597973 | Magnetic disk and method of producing the same | — | 2009-10-06 |
| 7537846 | Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk | Kenji Ayama | 2009-05-26 |
| 7452440 | Method and device for producing laminated composite | Michitaka Tsujimoto, Katsuo Matsuzaka, Koji Yamaguchi, Masashi Okabe, Masanori Hirata | 2008-11-18 |
| 7208236 | Magnetic recording medium with multi-portion carbon-based protection layer, and apparatus thereof | Takashi Morikawa, Teiichiro Umezawa, Hiroshi Tomiyasu | 2007-04-24 |
| 7174775 | Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof | — | 2007-02-13 |
| 7166319 | Magnetic disk and method of producing the same | — | 2007-01-23 |
| 7105241 | Magnetic disk and method of manufacturing same | Koichi Shimokawa | 2006-09-12 |
| 7063768 | Method and device for producing laminated composite | Michitaka Tsujimoto, Katsuo Matsuzaka, Koji Yamaguchi, Masashi Okabe, Masanori Hirata | 2006-06-20 |
| 6946191 | Magnetic recording medium | Takashi Morikawa, Teiichiro Umezawa, Hiroshi Tomiyasu | 2005-09-20 |