Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7855850 | Method and apparatus for head positioning using spiral servo patterns in a disk drive | Toshitaka Matsunaga, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Seiji Mizukoshi +1 more | 2010-12-21 |
| 7852593 | Method and apparatus for writing servo data, using spiral servo patterns in a disk drive | Seiji Mizukoshi, Hideo Sado, Toshitaka Matsunaga, Katsuki Ueda | 2010-12-14 |
| 7804659 | Method and apparatus for positioning head using spiral servo pattern in a disk drive | Toshitaka Matsunaga, Masahide Yatsu, Hideo Sado, Katsuki Ueda, Seiji Mizukoshi +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, Katsuki Ueda, Shinichirou Kouhara | 2009-12-29 |
| 7639446 | Disk drive device and servo write method | Seiji Mizukoshi, Hideo Sado, Toshitaka Matsunaga | 2009-12-29 |
| 7630161 | Method and apparatus for writing spiral servo pattern in a disk drive | Masahide Yatsu, Hideo Sado, Katsuki Ueda, Toshitaka Matsunaga, Seiji Mizukoshi +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 |
| 7423835 | Method and apparatus for servo control using spiral servo information in a disk drive | Hideo Sado, Masahide Yatsu, Masafumi Iwashiro, Seiji Mizukoshi, Shinichiro Kouhara | 2008-09-09 |
| 5043837 | Alignment disk for magnetic head azimuth correction | Hiroshi Okamura, Chikahisa Kawakami | 1991-08-27 |
| 4722010 | Read circuit for floppy disk drive | Hiroshi Suzuki | 1988-01-26 |