Issued Patents All Time
Showing 1–25 of 29 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, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami, Hiroki Watanabe | 2025-04-01 |
| 12254909 | VCM PWM to linear mode transition offset optimization to improve PES | Brian Johnson, Hideaki Ito, Gaku Ikedo, Naoyuki Kagami | 2025-03-18 |
| 11978482 | Data storage device with closed loop extended park mode during spin down operation | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami | 2024-05-07 |
| 11948603 | Optimize power, RTV, and coupled PES during seek operations | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami, Yasunori Fukuyama | 2024-04-02 |
| 11862202 | Data storage device with smart ISOFET threshold voltage automatic tuning | Brian Johnson, Hideaki Ito, Gaku Ikedo, Naoyuki Kagami | 2024-01-02 |
| 11837264 | Data storage device having dual actuators and method for data egress throttling during emergency power off retract (EPOR) | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami, Hiroki Watanabe | 2023-12-05 |
| 11823710 | Dual spindle motors and dual spindle motor control for data storage | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami | 2023-11-21 |
| 11763843 | VCM PWM to linear mode transition offset optimization to improve PES | Brian Johnson, Hideaki Ito, Gaku Ikedo, Naoyuki Kagami | 2023-09-19 |
| 11763844 | Data storage device having dual actuators and method for emergency power off retract (EPOR) of dual actuators | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami, Hiroki Watanabe | 2023-09-19 |
| 11749303 | Data storage device with soft on-disk activation of fine actuators | Brian Johnson, Gaku Ikedo, Hideaki Ito, Naoyuki Kagami | 2023-09-05 |
| 11482246 | Data storage device independently driving outer and inner fine actuators | Yanning Liu | 2022-10-25 |
| 11373678 | Data storage device using windowed delta-sigma analog-to-digital converter in digital current control loop | Naoyuki Kagami, Gaku Ikedo | 2022-06-28 |
| 11081988 | Data storage device with spread spectrum spindle motor control | — | 2021-08-03 |
| 10714133 | Data storage device capable of overriding a servo command to avoid an overcurrent condition | Brian Johnson, Ryan Mayo | 2020-07-14 |
| 10504553 | Data storage device transmitting delta servo control value over serial interface | — | 2019-12-10 |
| 10242698 | Data storage device regulating BEMF power voltage during power failure | Brian Johnson, Timothy A. Ferris | 2019-03-26 |
| 10242706 | Data storage device detecting spindle motor position at increased resolution using mutual inductive sense | Brian Johnson, Timothy A. Ferris | 2019-03-26 |
| 10176840 | Data storage device adjusting spindle motor current based on continuous function of voice coil current during seek | Brian Johnson, Hideaki Ito, Gaku Ikedo | 2019-01-08 |
| 10176835 | Data storage device employing predictive oversampling for servo control | Masahito Kobayashi, Timothy A. Ferris | 2019-01-08 |
| 10109308 | Data storage device using programmable deglitch window to detect saturation of VCM current control | Brian Johnson | 2018-10-23 |
| 10013032 | Current balancing circuit for multiple supply voltage systems | Timothy A. Ferris | 2018-07-03 |
| 9972348 | Data storage device employing smart braking to unload multiple voice coil motors | Timothy A. Ferris, Brian K. Tanner | 2018-05-15 |
| 9793912 | Analog-to-digital conversion circuitry with real-time adjusted gain and resolution | Timothy A. Ferris | 2017-10-17 |
| 9666224 | Data storage device adaptively estimating spindle motor current | — | 2017-05-30 |
| 9620160 | Data storage device measuring resonant frequency of a shock sensor by inserting the shock sensor into an oscillator circuit | Timothy A. Ferris | 2017-04-11 |