Inventor

MARUYAMA YOJI

JP18 patents

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

MARUYAMA YOJI

HITACHI GLOBAL STORAGE TECH

Perpendicular magnetic recording head for high frequency drive

Magnetic disk drive having a function for using a thermal protrusion amount for flying height management and an inspection device having such a function

Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head

Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head

Thin film magnetic head

Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the same

Magnetic write head including a magnetic pole piece having a protrusion

Main pole structure coupled with trailing gap for perpendicular recording

Magnetic head to prevent undesired data erasure and magnetic disk storage having the same

HITACHI LTD

Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head

Magnetic head and magnetic storage apparatus using the same

Magnetic head with dual spin valve element for differential operation

Drive circuit for Bloch line memory

Thin film magnetic head having multiple layered films determining track width imbedded in an insulating film and method of manufacturing the same

Magnetic storage apparatus having a head with sliding pads

HITACHI GLOBAL STORAGE TECH NL

Magnetic head and magnetic disk storage apparatus mounting the head

MARUYAMA YOJI

Perpendicular magnetic head with side shield depth less than write gap film

FUJITA KOICHI

Semiconductor device having a molded package