Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8315008 | Magnetic disk device and head position control method | Atsushi Suzuki, Masafumi Iwashiro | 2012-11-20 |
| 8300351 | Magnetic recording apparatus | Hiroyuki Suzuki, Hiroshi Kubota | 2012-10-30 |
| 7855850 | Method and apparatus for head positioning using spiral servo patterns in a disk drive | Toshitaka Matsunaga, Hideo Sado, Katsuki Ueda, Shouji Nakajima, Seiji Mizukoshi +1 more | 2010-12-21 |
| 7804659 | Method and apparatus for positioning head using spiral servo pattern in a disk drive | Toshitaka Matsunaga, Hideo Sado, Katsuki Ueda, Shouji Nakajima, Seiji Mizukoshi +1 more | 2010-09-28 |
| 7710682 | Method and apparatus for writing spiral servo pattern in a disk drive | Seiji Mizukoshi, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga, Shinichirou Kouhara +1 more | 2010-05-04 |
| 7675705 | Method and apparatus for writing servo pattern using spiral pattern in disk drive | Seiji Mizukoshi, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga, Shinichirou Kouhara +1 more | 2010-03-09 |
| 7630161 | Method and apparatus for writing spiral servo pattern in a disk drive | Shouji Nakajima, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga, Seiji Mizukoshi +1 more | 2009-12-08 |
| 7538965 | Method and apparatus for writing servo management information in a disk drive | Katsuki Ueda, Yuichi Notake, Hideo Sado, Seiji Mizukoshi, Takuji Shimada +1 more | 2009-05-26 |
| 7489468 | Method and apparatus for head positioning control in a disk drive | Yusuke Ohinata, Koji Osafune, Yuji Sakai | 2009-02-10 |
| 7477472 | Method and apparatus for writing servo data in a disk drive using spiral servo patterns | Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga, Seiji Mizukoshi, Shouji Nakajima +1 more | 2009-01-13 |
| 7457074 | Method and apparatus for correcting errors while writing spiral servo information in a disk drive | Hideo Sado, Yuichi Notake, Seiji Mizukoshi, Takayuki Matsuzaki, Takuji Shimada | 2008-11-25 |
| 7423835 | Method and apparatus for servo control using spiral servo information in a disk drive | Hideo Sado, Masafumi Iwashiro, Shouji Nakajima, Seiji Mizukoshi, Shinichiro Kouhara | 2008-09-09 |
| 7312946 | Method and apparatus for servo control in a disk drive | Makoto Asakura | 2007-12-25 |
| 7239472 | Method and apparatus for writing data in a disk drive | Hideo Sado, Tomoko Taguchi | 2007-07-03 |
| 7221533 | Method and apparatus for servo information writing in a disk drive | Masafumi Iwashiro, Hideo Sado | 2007-05-22 |
| 7173789 | Head position calculation method in magnetic disc apparatus | Shinichirou Kouhara, Masafumi Iwashiro, Hideo Sado, Seiji Mizukoshi | 2007-02-06 |
| 7106545 | Method and apparatus for servowriting in a disk drive | — | 2006-09-12 |
| 6943977 | Method and apparatus for servo writing in a disk drive | — | 2005-09-13 |
| 6771455 | Control system and control method for positioning a head above a desired position on disk | — | 2004-08-03 |
| 6738215 | Method and system for accurate self-servo writing by using relative position between head and writing surface | — | 2004-05-18 |
| 6417983 | System for head positioning control in a disk drive | — | 2002-07-09 |
| 6175465 | Head positioning control system for use in a disk storage drive | Hidetoshi Kawachi, Tatsuharu Kusumoto | 2001-01-16 |
| 6002544 | Head positioning control system for use in a disk drive using different target velocity data for read and write seeks | — | 1999-12-14 |
| 5801897 | Head positioning control system for use in a disk storage system | Hiroyuki Kanda, Tatsuharu Kusumoto | 1998-09-01 |
| 5754358 | Head positioning system and method for use in disk recording/reproducing apparatus | — | 1998-05-19 |