Inventor

KUMASAKA NORIYUKI

JP59 patents

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

KUMASAKA NORIYUKI

HITACHI LTD

Longitudinal magnetic recording media and magnetic memory units

Multilayered magnetic films and thin-film magnetic heads using the same as a pole

Process for preparing magnetic layer and magnetic head prepared using the same

Disk drive with unbalance correcting mechanism

Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducing

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Magnetic head and magnetic recording and reproducing apparatus using a superconducting quantum interference device

Magnetic multilayered film and magnetic head using the same

Multilayered ferromagnetic amorphous alloy film and magnetic head employing the same

Magnetic film structure

Magnetic head and method of fabricating same

Thin film magnetic head and fabricating method thereof

Thin film magnetic head

Glass composition, structure, and apparatus using the same

Ferromagnetic film and magnetic head using the same

Magnetic film and magnetic head using the same

Magnetic head

Magnetic head with sealing glass composition

Glass composition, structure, and apparatus using the same

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Disk apparatus and motor therefor

Video signal recording and reproducing apparatus compatible with analog and digital video signal recording and reproducing

Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Heat resistant, high saturation magnetic flux density film

Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Amorphous magnetic alloy of Co-Nb-Zr system and magnetic head made from the same

Thin film magnetic head including magnetic layers having high saturation magnetic flux density and metal film for avoiding deterioration during manufacturing

Magnetic Multilayer structure

Process for preparing magnetic layer and magnetic head prepared using the same

Magnetic head having short distance between gaps for recording reproducing and erasing

Magnetic head having an integrated recording and playback head and an erasure head

Magnetic head having ferromagnetic amorphous alloy multi-layered film

Magnetic head made from amorphous magnetic film

Ferromagnetic material and a magnetic head using the same material

Magnetic recording and reproducing system with composite magnetic head

Composite type magnetic head for recording and reproducing high frequency signals

Control method of magnetic anisotropy and device utilizing the control method

Amorphous alloys for magnetic head core and video magnetic head using same

Magnetic head having improved track width narrowing grooves

Composite type magnetic head with non-magnetic member in coil mounting portion

Magnetic head

Magnetic head

Ferrromagnetic thin film and magnetic head using it

Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Disk drive unit with hydrodynamic fluid bearing unit and disk device with said drive unit

Magnetic head having main and auxiliary magnetic paths

NIPPON MICRO COATING KK

Texturing slurry and texturing method by using same

Polishing material comprising diamond clusters

HITACHI METALS LTD

Material for nonmagnetic oxide substrate and magnetic head

HITACHI MAXELL

Magnetic head to effect high density magnetic recording