Issued Patents All Time
Showing 25 most recent of 48 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12266385 | Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators | Brian Johnson, Jaesoo Byoun, Gaku Ikedo, Hideaki Ito, Hiroki Watanabe | 2025-04-01 |
| 12254909 | VCM PWM to linear mode transition offset optimization to improve PES | Jaesoo Byoun, Brian Johnson, Hideaki Ito, Gaku Ikedo | 2025-03-18 |
| 11978482 | Data storage device with closed loop extended park mode during spin down operation | Brian Johnson, Jaesoo Byoun, Gaku Ikedo, Hideaki Ito | 2024-05-07 |
| 11948603 | Optimize power, RTV, and coupled PES during seek operations | Brian Johnson, Jaesoo Byoun, Gaku Ikedo, Hideaki Ito, Yasunori Fukuyama | 2024-04-02 |
| 11862202 | Data storage device with smart ISOFET threshold voltage automatic tuning | Brian Johnson, Jaesoo Byoun, Hideaki Ito, Gaku Ikedo | 2024-01-02 |
| 11837264 | Data storage device having dual actuators and method for data egress throttling during emergency power off retract (EPOR) | Brian Johnson, Jaesoo Byoun, Gaku Ikedo, Hideaki Ito, Hiroki Watanabe | 2023-12-05 |
| 11823710 | Dual spindle motors and dual spindle motor control for data storage | Jaesoo Byoun, Brian Johnson, Gaku Ikedo, Hideaki Ito | 2023-11-21 |
| 11763844 | Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators | Brian Johnson, Jaesoo Byoun, Gaku Ikedo, Hideaki Ito, Hiroki Watanabe | 2023-09-19 |
| 11763843 | VCM PWM to linear mode transition offset optimization to improve PES | Jaesoo Byoun, Brian Johnson, Hideaki Ito, Gaku Ikedo | 2023-09-19 |
| 11749303 | Data storage device with soft on-disk activation of fine actuators | Jaesoo Byoun, Brian Johnson, Gaku Ikedo, Hideaki Ito | 2023-09-05 |
| 11373678 | Data storage device using windowed delta-sigma analog-to-digital converter in digital current control loop | Jaesoo Byoun, Gaku Ikedo | 2022-06-28 |
| 11043243 | Calibrating elevator actuator for disk drive | Kexiu Liu, Kuang-Yang Tu, Jenghung Chen, Gaku Ikedo | 2021-06-22 |
| 10996740 | Write data protection at emergency power off | Hiroki Watanabe, Gaku Ikedo, James Jinshi Ng, Brian K. Tanner | 2021-05-04 |
| 10635158 | Write data protection at emergency power off | Hiroki Watanabe, Gaku Ikedo, James Jinshi Ng, Brian K. Tanner | 2020-04-28 |
| 7035034 | Data storage device, control device, off-track control method, and control method | Tetsuo Semba, Akira Tokizono, Gaku Ikedo | 2006-04-25 |
| 7019921 | Control method and apparatus for reducing the effects of hard disk contamination | Masayuki Kanamaru, Shunichiroh Ohta, Akira Tokizono, Toshihiko Tsunokawa | 2006-03-28 |
| 6961202 | Data storage device having acceleration sensor attached to circuit board for detecting vibrations in planar rotation direction along circuit board | Gaku Ikedo, Mirei Hosono, Yoshitaka Kakizaki | 2005-11-01 |
| 6937408 | Rotation recording apparatus and method of inspection thereof | Ryoheita Hattori, Tetesuya Kokubo, Nobuya Matsubara, Kaoru Umemura | 2005-08-30 |
| 6937422 | Self-monitoring and self-healing of frequency specific position errors in a data storage device | Hien Dang, Mirei Hosono, Kenji Okada, Arun Sharma, Gordon James Smith +1 more | 2005-08-30 |
| 6831809 | Rotary recording apparatus and method of controlling the apparatus | Kenji Okada, Tetsuo Semba, Akira Tokizono, Hiroshi Uchida, Akinori Yuba | 2004-12-14 |
| 6754019 | System and method for implementing a rotary memory device | Akira Tokizono, Hiroshi Uchida, Takashi Kuroda | 2004-06-22 |
| 6707634 | Control method and apparatus for reducing the effects of hard disk contamination | Masayuki Kanamaru, Shunichiroh Ohta, Akira Tokizono, Toshihiko Tsunokawa | 2004-03-16 |
| 6690537 | Method and system for controlling the positioning of a read/write head of a data recording device | Akira Tokizono, Hiroshi Uchida | 2004-02-10 |
| 6678109 | Disk drive, servo control unit, and control unit | Masayuki Murakami, Yuzo Nakagawa, Tatsuya Sakai | 2004-01-13 |
| 6614613 | Phase technique for active damping in a servo-controlled actuator | Fu-Ying Huang, Tetsuo Semba, Eiji Soga, Shingo Tsuda | 2003-09-02 |