Inventor

EHRLICH RICHARD M

US114 patents

⚠️ This page may combine multiple inventors who share the name “EHRLICH RICHARD M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

EHRLICH RICHARD M

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Methods for variable multi-pass servowriting and self-servowriting

Methods for limiting channel control values to thereby improve servo-demodulation robustness

Propagation self servowrite using self-written spiral signals for in-process calibration

Systems for searching for SAM patterns at multiple nominal frequencies

Systems and methods for efficient writing of low-RRO phase-burst servo patterns

Systems and methods for using worf to identify burst patterns for repair

Method for optimizing dynamic stroke in the self servo-write process

Apparatus to reject disk drive disturbance

Dynamic stroke optimization in the self servo-write process

Systems and methods for two-step self-servowriting using optimal intermediate pattern

HDD with rapid availability of critical data after critical event

Template pattern for improving printed media self-servo writing

Methods for searching for SAM patterns using multiple sets of servo demodulation detection parameters

Servo demodulator systems including multiple servo demodulators

Systems and methods for printed-media SSW reference pattern with extra servo bursts used near OD

Methods using extended servo patterns with variable multi-pass servowriting and self-servowriting

Variable frequency chevron in printed media reference pattern to improve servo demodulation

Methods for selective multi-pass servowriting and self-servowriting

Systems and rotatable media for increasing the usable position error signal (PES) region

Systems and methods for reducing power dissipation in a disk drive including an adjustable output voltage regulator

Methods for self-servowriting using write-current variation

Two-pass-per-track servo burst patterns

Systems and methods for two-step reference pattern self-servowriting

Method to reject disk drive disturbance

Methods for searching for SAM patterns at multiple nominal frequencies

Variable frequency chevron in printed media reference pattern to improve servo demodulation

Systems for limiting channel control values to thereby improve servo-demodulation robustness

TOSHIBA KK

Data center dual stage drive with data striping

Low track-per-inch (TPI) zone with reduced need for adjacent-track-erasure (ATE) refresh

Hard disk drive off track event method and device

Method and apparatus for phase-shift null-burst-pattern

Split-actuator drive that coordinates fractional-wedge timing of aggressor and victim for effective victim feedforward

Split-actuator disk drive that uses microactuator feedforward to reduce effects of cross-actuator coupling

Split actuator drive that limits slew rate of aggressor VCM to reduce victim disturbances

Split-actuator disk drive that uses microactuator feedforward to reduce effects of cross-actuator coupling

Split-actuator disk drive that uses microactuator feedforward to reduce effects of cross-actuator coupling

QUANTUM CORP

Disk drive having on-board triggered digital sampling analyzer

Digital multi-rate notch filter for sampled servo digital control system

In drive correction of servo pattern errors

Synchronous detection of wide bi-phase coded servo information for disk drive

Position feedback system for volume holographic storage media

In-drive correction of servo pattern errors

MAXTOR CORP

Hard disk drive having self-written servo burst patterns

Method for providing variable gain, iterative embedded runout correction in a disk drive

Synchronous detection of wide bi-phase coded servo information for disk drive

TOSHIBA CORP

Disk drive servo

KABUHSIKI KAISHA TOSHIBA

Disk drive write method

EHRLICH RICHARD M

Proximity detection method for magnetic head and recording medium

PANASONIC CORP

Systems and methods for rewriting data of data tracks potentially affected by data transfer operations in rotatable storage media

MATSUSHITA ELECTRIC CO LTD

Methods for improving servo-demodulation robustness