Tetsuo Semba
51Patents
14h-index
36Co-inventors
84Inventor score
Filing activity: Nov 17, 1992 → Jan 19, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6219196A | Method and apparatus for suppressing mechanical resonance in a disk drive storage device using a notch filter | Physics | 40 | Expired |
| US5504726A | Method and apparatus for calibrating focus and tracking error signals in an optical drive with measuring offsets during track jumps | Physics | 29 | Expired |
| US9286926B1 | Two-dimensional magnetic recording (TDMR) disk drive with varying servo track pitch | Physics | 24 | Active |
| US6614613B1 | Phase technique for active damping in a servo-controlled actuator | Physics | 24 | Expired |
| US8842507B1 | Heat-assisted magnetic recording disk drive (HAMR) with thermal sensor and laser power prediction | Physics | 22 | Active |
| US7079339B1 | Dual-stage actuator disk drive with method for secondary-actuator failure detection and recovery using a relative-position sensor while track following | Physics | 19 | Expired |
| US8724248B2 | Method and apparatus for compensating vibration by adjusting track pitch | Physics | 19 | Active |
| US7079338B1 | Dual-stage actuator disk drive with method for secondary-actuator failure detection and recovery while track-following | Physics | 19 | Expired |
| US7012777B1 | Disk drive with capacitance sensing of disk vibration and feedforward control for removal of read/write head track misregistration | Physics | 17 | Expired |
| US7206162B2 | Seek trajectory generation using adaptive filtering | Physics | 16 | Expired |
| US7133229B2 | Magnetic recording disk drive with patterned media and compensation for write-clock timing error caused by rotational disturbances | Physics | 16 | Expired |
| US9792938B1 | Data storage device communicating servo information between servo channels of multiple actuators | Physics | 15 | Active |
| US7035034B2 | Data storage device, control device, off-track control method, and control method | Physics | 15 | Expired |
| US7486470B1 | Hard disk drive vibration cancellation using adaptive filter | Physics | 14 | Active |
| US5768228A | Method and sytem for cancelling optical servo crosstalk in optical disk drives | Physics | 14 | Expired |
| US6831809B2 | Rotary recording apparatus and method of controlling the apparatus | Physics | 14 | Expired |
| US7177113B1 | Magnetic recording disk drive with switchable rotational vibration cancellation | Physics | 12 | Expired |
| US7010653B2 | Data storage device, command queue re-ordering method, and data processing method and program | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5760991A | Disk storage unit positioning control for applying DC offsets to a tracking error | Physics | 11 | Expired |
| US7375916B2 | Magnetic recording disk drive with multiple feedforward controllers for rotational vibration cancellation | Physics | 11 | Active |
| US7145746B1 | Disk drive with adaptive control of periodic disturbances | Physics | 11 | Expired |
| US5323368A | Track crossing apparatus and method using the difference between pick-up velocity and a predetermined velocity | Physics | 10 | Expired |
| US5317550A | Apparatus and method for track access | Physics | 10 | Expired |
| US7268968B2 | Vibration suppression for servo control | Physics | 10 | Expired |
| US7345841B2 | Disk drive using a disturbance sensor for disturbance frequency-identification and suppression | Physics | 10 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.