Inventor

HAMAGUCHI TAKEHIKO

JP47 patents

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

HAMAGUCHI TAKEHIKO

HITACHI GLOBAL STORAGE TECH

Magnetic disk drive

Magnetic recording/reproducing device

Thermal assist head slider

Stray field detector, magnetic disk drive, and method of head escaping

Method of servo writing for magnetic recording system, magnetic recording system

Magnetic disk drive

Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data

Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data

Servo information recording method, magnetic recording media, and magnetic disk apparatus

Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle

Method of servo writing for magnetic recording system, magnetic recording system

Magnetic recording apparatus

Magnetic head tester and method of manufacturing magnetic disk drive

Magnetic recording disk drive

Magnetic disk degaussing device and degaussing method

Method of servo writing for magnetic recording system, magnetic recording system

Magnetic hard disk drive

Perpendicular hard disk drive resistive against external magnetic field

Alternative DC-burst servo pattern for perpendicular recording

HITACHI LTD

Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angle

Method for reproducing information on a recording medium

Adjacent track position detectable information storage apparatus

Method of controlling read write operation of a magnetic disk apparatus

Magnetic disk apparatus with data track reassigning function

Magnetic disk drive

Magnetic disk drive

Magnetic recorder and magnetooptical recorder

Magnetic recording apparatus

Magnetic recording apparatus, magnetic recording medium and magnetic recording method

Magnetic disk drive

Method and system for compensation of nonlinearity or fluctuation of head-position signal

Method and system for compensation of nonlinearity or fluctuation of head-position signal

Magnetic digital storage method and system wherein magnetic transition points in adjacent recorded tracks are out of phase with each other

Magnetic recording disk drive

Magnetic hard disk drive

Information recording/reproducing device

Magnetic disk device having a write head to write by shifting in a radial direction

WESTERN DIGITAL TECH INC

Data storage device defining track trajectory to reduce AC track squeeze

Data storage device generating PES RRO and data sector squeeze RRO for a plurality of zones

Seek time to the beginning position of data on tape media

Data storage device defining track trajectory to reduce AC track squeeze

Methods for improving track density in dual-reel removable tape devices and fixed tape devices

Methods for increasing storage capacity and improving performance in dual-reel removable tape devices and fixed tape devices

KONISHIROKU PHOTO IND

Folding camera with movable member mounting an objective lens and reflex mirror

Method of producing analytical curve

Apparatus for detecting focal point

HITACHI GLOBAL STORAGE TECH NL

Control method for magnetic disk device, magnetic disk device, and magnetic disk