P

Inventor

FUJIWARA HIDEO

JP73 patents
⚠️ This page may combine multiple inventors who share the name “FUJIWARA HIDEO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

20 patents
US5648885AJul 15, 1997

Giant magnetoresistive effect sensor, particularly having a multilayered magnetic thin film layer

HITACHI LTD111 citations97
US4013911AMar 22, 1977

Displacement - electricity transducer

HITACHI LTD69 citations95
US4005396AJan 25, 1977

Digital displacement sensor with zigzag coils

HITACHI LTD68 citations93
US4840844AJun 20, 1989

Magnetic recording medium

HITACHI LTD38 citations92
US4651248AMar 17, 1987

Thin-film magnetic head

HITACHI LTD34 citations92
US4610935ASep 9, 1986

Magnetic film structure

HITACHI LTD41 citations92
US4571650AFeb 18, 1986

Magneto-optic information storage system utilizing a self-coupled laser

HITACHI LTD28 citations92
US4559572ADec 17, 1985

Magnetic head and method of fabricating same

HITACHI LTD29 citations92
US4636897AJan 13, 1987

Perpendicular magnetic recording and reproducing thin film head

HITACHI LTD55 citations89
US4621030ANov 4, 1986

Perpendicular magnetic recording medium and manufacturing method thereof

HITACHI LTD24 citations82
US4316228AFeb 16, 1982

Magnetic head

HITACHI LTD22 citations81
US4031496AJun 21, 1977

Variable inductor

HITACHI LTD30 citations81
US4972285ANov 20, 1990

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

HITACHI LTD11 citations74
US4774616ASep 27, 1988

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

HITACHI LTD17 citations74
US4656547AApr 7, 1987

Composite type magnetic head for recording and reproducing high frequency signals

HITACHI LTD19 citations74
US4544591AOct 1, 1985

Perpendicular magnetic recording medium

HITACHI LTD7 citations74
US4411716AOct 25, 1983

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

HITACHI LTD16 citations74
US4745507AMay 17, 1988

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

HITACHI LTD7 citations73
US4450494AMay 22, 1984

Magnetic head

HITACHI LTD11 citations73
US4439794AMar 27, 1984

Magnetic head

HITACHI LTD16 citations73

HITACHI MAXELL

17 patents
US5783320AJul 21, 1998

Magneto-optical recording medium and process for producing the same

HITACHI MAXELL18 citations92
US5543221AAug 6, 1996

Magnetic recording medium

HITACHI MAXELL45 citations92
US5480694AJan 2, 1996

Magnetic recording medium

HITACHI MAXELL26 citations92
US5068152ANov 26, 1991

Magnetic recording medium

HITACHI MAXELL25 citations92
US5639547AJun 17, 1997

Magnetic heads and magnetic recording reproducing devices using magnetic laminations

HITACHI MAXELL8 citations74
US5965286AOct 12, 1999

Magneto-optical recording medium

HITACHI MAXELL5 citations73
US5637411AJun 10, 1997

Magneto-optical recording medium and process for producing the same

HITACHI MAXELL11 citations73
US5139884AAug 18, 1992

Magnetic recording medium comprising an aluminum substrate in which pores formed by anodic oxidation contain crystallographicaly discontinuous particles of fe-alloy

HITACHI MAXELL16 citations73
US5059337AOct 22, 1991

Soft magnetic materials comprising 9 to 15 atomic percent carbon atoms

HITACHI MAXELL8 citations73
US4895758AJan 23, 1990

Magnetic recording medium

HITACHI MAXELL16 citations73
US4828919AMay 9, 1989

Magnetic recording medium and process for preparing the same

HITACHI MAXELL12 citations73
US4803578AFeb 7, 1989

Assembly for stably mounting magnetic head on carriage

HITACHI MAXELL12 citations73
US4948667AAug 14, 1990

Magnetic head

HITACHI MAXELL9 citations72
US4941064AJul 10, 1990

Magnetic head having a pair of cores in which the opposing surfaces thereof are coated with a non-magnetic layer and a low melting point glass layer

HITACHI MAXELL9 citations72
US5021276AJun 4, 1991

Optical data recording medium and manufacturing method thereof

HITACHI MAXELL13 citations71
US4996089AFeb 26, 1991

Optical data recording medium

HITACHI MAXELL12 citations71
US4814920AMar 21, 1989

Magnetic head with a slider

HITACHI MAXELL8 citations71

SUZUKI MOTOR CO

3 patents

RICOH KK

3 patents

UNIV ALABAMA

2 patents

SEMICONDUCTOR TECH ACAD RES CT

2 patents

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

1 patent

SHIIKI KAZUO

1 patent

SUMIZAWA AKIO

1 patent

Showing the top 50 of 73 patents by PatentIndex Score.