Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6738214 | Detection of static and dynamic position of disk drive | Kiyoshi Ishiyama | 2004-05-18 |
| 6738216 | Apparatus and method for head load control in disk drive | Naoaki Kawana | 2004-05-18 |
| 6687090 | Head suspension assembly with head amplifier IC | Seishiro Fujiwara | 2004-02-03 |
| 6377411 | Head IC, head amplifier circuit, head suspension assembly, and magnetic disk drive for avoiding electrostatic breakdown of magnetic head | Makoto Katsumata, Kenji Tsuruta | 2002-04-23 |
| 6377015 | Voice coil motor control apparatus for use in disk drives | Yoichi Nakabayashi | 2002-04-23 |
| 5627441 | Apparatus for controlling motor drive and method for controlling thereof | Tetsuji Sakurai | 1997-05-06 |
| 5585701 | Current mirror circuit constituted by FET (field effect transistor) and control system using the same | Hidemichi Kiuchi, Tetsuji Sakurai | 1996-12-17 |
| 5432414 | Sensorless spindle motor control apparatus | Tetsuji Sakurai | 1995-07-11 |
| 5373403 | Method and apparatus for automatic gain control amplifier adjustment for a magnetic medium | Hiroshi Okamura, Hideo Masaki, Tetsuji Sakurai, Takahiro Koyanagi | 1994-12-13 |
| 5327052 | Method and apparatus for controlling brushless DC motor | Tetsuji Sakurai, Hideo Masaki, Takahiro Koyanagi | 1994-07-05 |
| 5282099 | Disk drive apparatus incorporating circuitry into housing | Seiji Kawagoe | 1994-01-25 |
| 5270878 | Magnetic recording and reproducing apparatus | Hideo Masaki | 1993-12-14 |
| 5208711 | Data recording/reproducing apparatus having recording head position detection and control | Shunji Kitamura | 1993-05-04 |
| 5206567 | Apparatus for reliably activating sensorless and brushless DC motor | Tetsuji Sakurai, Hideo Masaki | 1993-04-27 |
| 4794469 | Recorded data reproducing apparatus | Kenji Asai | 1988-12-27 |
| 4772964 | Recorded data reproducing apparatus capable of performing auto-gain adjustment | — | 1988-09-20 |