Inventor

KUPFERMAN HANAN

US26 patents

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

KUPFERMAN HANAN

WESTERN DIGITAL TECH INC

Adjusting voltage delivered to disk drive circuitry based on a selected zone

Disk drive having one or more partial servo wedges that includes a short servo sync mark that is different than the servo sync word of full servo wedges

Method of simultaneously writing servo tracks on a hard disk drive

Disk drive employing separate read and write repeatable runout estimated values for a head having a read element offset from a write element

Disk drive estimating a servo zone after synchronously detecting a servo sync mark

Disk drive subtracting low frequency disturbance from a servo burst signal

Rotating media storage device having a calibration track with unique calibration servo synch marks

Magnetic disk in a disk drive and method having improved null servo burst phasing

Reducing the length of servo-wedges in a disk drive

Disk drives and disk drive containing devices that include a servo frequency generator and spindle control timer that compensate for disk eccentricity

Disk drive servo controller utilizing an extended servo header

Disk drive having a disk including a servo burst pattern in which a phase difference between radially adjacent servo bursts is less than 180 degrees

Disk drive having a disk including a servo burst pattern that improves the signal to noise ratio during track following for writing

Servo synchronization validation techniques based on both servo synch marks and wedge identifiers in a rotating media storage device

Disk drive having a disk including a servo burst pattern having a normal servo burst field and a quadrature servo burst field

Servo synchronization based on a servo synch mark that conflicts with self-clocking encoding algorithms

Disk drive comprising asynchronous/synchronous gain control for fault tolerant detection of servo sync mark after head switch

Method of calibrating a write current-setting for servo writing a disk drive

Headerless disk drive comprising repeatable runout (RRO) correction values recorded at a user data rate

Disk drive employing a non-volatile semiconductor memory for storing read channel parameter calibrated for the disk drive used to recover disk channel parameter

Method and apparatus for RRO learning before and after shipping to cancel RRO in a disk drive

Disk drive having adaptively-sized sectors to compensate for disk eccentricity

Disk drive and method having cost-effective storage of the disk drive&#39;s internal program code

KUPFERMAN HANAN

Disk drive comprising preamble aligned zoned servo sectors

MITSUMI ELECTRIC CO LTD

Disk drive power control circuit and method

WESTERN DIGITAL CORP

Constant velocity servo linearity calibration method for MR head

Disk drive and method having cost-effective storage of the disk drive's internal program code