Inventor

HIRAYAMA YOSHIYUKI

JP61 patents

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

HIRAYAMA YOSHIYUKI

HITACHI LTD

Magnetic head, magnetic recording method and apparatus for controlling magnetic head with spin torque oscillator in a disk drive

Perpendicular magnetic recording media, magnetic recording apparatus

Perpendicular magnetic recording medium and magnetic storage apparatus using the same

Magnetic recording medium and magnetic recording apparatus using the same

Magnetic recording medium and magnetic recording apparatus using the same

Perpendicular magnetic recording media and magnetic recording device

Magnetic recording medium and fabrication method therefor

Perpendicular-magnetic recording media and magnetic recording apparatus

Magnetic recording medium and magnetic recording apparatus using the same

Magnetic recording medium

Method of fabricating a magnetic recording medium

Perpendicular magnetic recording medium and magnetic recording apparatus

Perpendicular magnetic recording media and magnetic recording and reproducing apparatus using the same

Method of fabricating a magnetic recording medium

Method for testing or recording servo signal on perpendicular magnetic recording media

Method for testing or recording servo signal on perpendicular magnetic recording media

Perpendicular-magnetic recording media and magnetic recording apparatus

Magnetic recording medium and magnetic recording apparatus using the same

Magnetic recording medium and magnetic recording apparatus using the same

Magnetic recording medium

Magnetic recording medium and magnetic recording apparatus using the same

Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same

Magnetic recording media, magnetic heads and magnetic read-write apparatus using the same

Manganese-aluminum and manganese-silicon magnetic films, and magnetic recording medium

Microwave assisted magnetic recording medium and information recording apparatus using the same

Perpendicular-magnetic recording media and magnetic recording apparatus

HITACHI GLOBAL STORAGE TECH

Perpendicular magnetic recording media and magnetic storage apparatus using the same

Magnetic recording medium and magnetic recording apparatus

Perpendicular magnetic recording media

Magnetic recording medium with controlled grain diameters and method for manufacturing the same

Perpendicular magnetic recording medium and method of manufacturing it

Magnetic recording medium and magnetic recording system using the same

Perpendicular magnetic recording media, magnetic recording apparatus

Perpendicular magnetic recording medium and magnetic storage apparatus using the same

Perpendicular magnetic recording media and magnetic storage apparatus using the same

Perpendicular magnetic recording media, magnetic recording apparatus

FUJI XEROX CO LTD

Image data parallel processing apparatus

Image processing apparatus capable of properly determining density of a background portion

Parallel processing apparatus for recognizing an area marked with a closed loop

Automatic density control method for a photocopying machine

Automatic exposure control for a photocopying machine

Copying system capable of designating a copying area

FURUKAWA ELECTRIC CO LTD

Schottky junction device having a Schottky junction of a semiconductor and a metal

Strained superlattice semiconductor photodetector having a side contact structure

Semiconductor laser device featuring group III and IV compounds doped with amphoteric impurity to vary electrical resistance according to direction of crystal plane

MEIDENSHA ELECTRIC MFG CO LTD

Method and apparatus for detecting islanding operation of dispersed generator

FURUKAWA AUTOMOTIVE SYSTEMS INC

Electromagnetic shielding tube

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

High-density circuit module and method of producing the same

HGST Netherlands BV

Magnetic recording medium having a L10-type ordered alloy

HITACHI GLOBAL STORAGE TECH NL

Perpendicular magnetic recording medium and magnetic storage apparatus using the same