Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12431161 | Data storage device with track pitch determination for mitigating effects of servo pattern distortion | So Ogiwara, Yoshio Soyama, Kei Yasuna, Shuji Nishida | 2025-09-30 |
| 10748567 | Data storage device aborting write operation based on accumulated track squeeze metric for adjacent data track | Niranjay Ravindran, So Ogiwara, Toshihisa Komai, Alain Chahwan, Weldon M. Hanson | 2020-08-18 |
| 9025420 | Self-controlled laser pulsing for thermally assisted recording | Naoto Ito, Michiya Kazusawa, Hiroyasu Tanabe, Sarbanoo Das | 2015-05-05 |
| 8797672 | Dynamic track pitch control for shingled magnetic recording (SMR) | Hiroyasu Tanabe, Kyo Akagi, Naoto Ito | 2014-08-05 |
| 8248893 | Energy-assisted magnetic-recording head having a magnetic-recording assistance element disposed to lower magnetic-recording field for reversing magnetization in a magnetic-recording disk | Masafumi Mochizuki, Hiroyasu Tanabe, Hideaki Maeda | 2012-08-21 |
| 8169729 | Magnetic recording/reproducing using a patterned medium | Hiroyasu Tanabe | 2012-05-01 |
| 8027113 | Magnetic read/write device preventing malfunction due to reversal in polarity | — | 2011-09-27 |
| 8018672 | Magnetic recording device and magnetic recording method thereof | Hideaki Maeda, Hiroyasu Tanabe, Masafumi Mochizuki | 2011-09-13 |
| 7969678 | Magnetic disk drive having assisted recording and methods of recording data thereto | Hiroyasu Tanabe, Hideaki Maeda, Masafumi Mochizuki | 2011-06-28 |
| 7920359 | Magnetic recording apparatus with correlated main magnetic pole-to-shields spacing and main magnetic pole-to-medium layers spacing | Yohji Maruyama, Nelson Cheng, Hisao Okamoto | 2011-04-05 |
| 7646564 | Perpendicular magnetic recording head for high frequency drive | Yoji Maruyama, Ichiro Ohdake, Kazue Kudo, Masafumi Mochizuki | 2010-01-12 |
| 7636212 | Magnetic disk drive with control of sense current of magnetic head | Akira Morinaga, Hiroshi Ide, Hideo Tanabe | 2009-12-22 |
| 7508619 | Magnetic head and magnetic disc drive | Hisao Okamoto | 2009-03-24 |
| 7245447 | Magnetic read/write apparatus having a write inhibit slice setting circuit | — | 2007-07-17 |
| 7031091 | Magnetic recording apparatus and method of writing data at low temperature | Takayuki Ichihara, Futoshi Tomiyama | 2006-04-18 |
| 6909566 | Magnetic recording/reproducing device | Takehiko Hamaguchi, Futoshi Tomiyama | 2005-06-21 |
| 6879460 | Magnetic recording disk drive | Futoshi Tomiyama, Takehiko Hamaguchi, Toru Matsushita, Reijiro Tsuchiya, Hisashi Takano | 2005-04-12 |
| 6760172 | Magnetic disk drive | Takehiko Hamaguchi, Futoshi Tomiyama | 2004-07-06 |
| 6717760 | Magnetic disk drive | Takehiko Hamaguchi, Futoshi Tomiyama, Hisashi Takano | 2004-04-06 |
| 6657804 | Magnetic recording disk drive | Futoshi Tomiyama, Takehiko Hamaguchi, Toru Matsushita, Reijiro Tsuchiya, Hisashi Takano | 2003-12-02 |
| 6635367 | Magnetic recording medium | Masukazu Igarashi, Fumiko Akagi, Futoshi Tomiyama | 2003-10-21 |
| 6473254 | Method and system for compensation of nonlinearity or fluctuation of head-position signal | Takehiko Hamaguchi, Futoshi Tomiyama, Hisashi Takano | 2002-10-29 |
| 6404576 | Method and system for compensation of nonlinearity or fluctuation of head-position signal | Takehiko Hamaguchi, Futoshi Tomiyama, Hisashi Takano | 2002-06-11 |