Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11521647 | Magnetic disk device and manufacturing method thereof | Takuya Ogawa, Wataru Tsukahara | 2022-12-06 |
| 9934805 | Magnetic disk device and write method | Wataru Tsukahara, Takao Abe | 2018-04-03 |
| 7855850 | Method and apparatus for head positioning using spiral servo patterns in a disk drive | Toshitaka Matsunaga, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Shouji Nakajima +1 more | 2010-12-21 |
| 7804659 | Method and apparatus for positioning head using spiral servo pattern in a disk drive | Toshitaka Matsunaga, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Shouji Nakajima +1 more | 2010-09-28 |
| 7710682 | Method and apparatus for writing spiral servo pattern in a disk drive | Seiji Mizukoshi, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga +1 more | 2010-05-04 |
| 7675705 | Method and apparatus for writing servo pattern using spiral pattern in disk drive | Seiji Mizukoshi, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga +1 more | 2010-03-09 |
| 7639445 | Disk drive device and head positioning control method | Toshitaka Matsunaga, Hideo Sado, Seiji Mizukoshi, Shouji Nakajima, Katsuki Ueda | 2009-12-29 |
| 7630161 | Method and apparatus for writing spiral servo pattern in a disk drive | Shouji Nakajima, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga +1 more | 2009-12-08 |
| 7477472 | Method and apparatus for writing servo data in a disk drive using spiral servo patterns | Hideo Sado, Masahide Yatsu, Katsuki Ueda, Toshitaka Matsunaga, Seiji Mizukoshi +1 more | 2009-01-13 |
| 7173789 | Head position calculation method in magnetic disc apparatus | Masahide Yatsu, Masafumi Iwashiro, Hideo Sado, Seiji Mizukoshi | 2007-02-06 |