Inventor

UWABO TSUNEO

JP34 patents

Patents

34 patents

US5953187ASep 14, 1999

High-density flexible disk drive having a function of facilitating correct insertion of a large-capacity flexible disk thereinto without an insertion error

MITSUMI ELECTRIC CO LTD78 citations96

US5940255AAug 17, 1999

Large-capacity flexible disk and high-density type disk drive used therefor

MITSUMI ELECTRIC CO LTD86 citations96

US5648882AJul 15, 1997

Front structure for magnetic recording system

MITSUMI ELECTRIC CO LTD20 citations92

US5583745ADec 10, 1996

Data recording and reproducing device comprising a memory unit used for a memory card

MITSUMI ELECTRIC CO LTD38 citations92

US5396385AMar 7, 1995

Floppy disk drive

MITSUMI ELECTRIC CO LTD20 citations92

US5995469ANov 30, 1999

Disk device having movable cartridge holder and a cam plate having a cam groove with three successive inclined cam groove portions

MITSUMI ELECTRIC CO LTD14 citations82

US6239950B1May 29, 2001

High density flexible disk drive having a large capacity detecting switch provided at a position corresponding to a large capacity identifier hole provided in a case of a large capacity flexible disk

MITSUMI ELECTRIC CO LTD12 citations74

US6137762AOct 24, 2000

Disk device with improved movement mechanism

MITSUMI ELECTRIC CO LTD9 citations74

US6072655AJun 6, 2000

Magnetic disk drive having a position detection unit for detecting a current position of a magnetic head

MITSUMI ELECTRIC CO LTD14 citations74

US5880907AMar 9, 1999

Floppy disk device with a pair of double-liners holding a floppy disk by the double-liner pair

MITSUMI ELECTRIC CO LTD6 citations63

US6130806AOct 10, 2000

Disk cartridge comprising an improved magnetic disk medium including an annular reinforcing member

MITSUMI ELECTRIC CO LTD2 citations63

US6111727AAug 29, 2000

Flexible disk comprising a supporting hub for supporting a magnetic recording medium inside of a bottom portion

MITSUMI ELECTRIC CO LTD3 citations63

US6021028AFeb 1, 2000

Method of writing servo data and magnetic recording medium on which the servo data is written by the method

MITSUMI ELECTRIC CO LTD5 citations63

US5933295AAug 3, 1999

Magnetic disk drive with carriage lock lever locking mechanism

MITSUMI ELECTRIC CO LTD5 citations63

US5875077AFeb 23, 1999

Servo writer for a large capacity floppy disk having an integrated direct-acting head carriage and actuator

MITSUMI ELECTRIC CO LTD4 citations63

US5844746ADec 1, 1998

High-density disk drive having a cover portion which protects a light weight head carriage from electromagnetic noise

MITSUMI ELECTRIC CO LTD4 citations63

US5822157AOct 13, 1998

Magnetic data recording/reproducing device with voice coil motor having center yoke back yoke with bent portions and permanent magnet arranged to generate magnetic fields

MITSUMI ELECTRIC CO LTD2 citations63

US5831794ANov 3, 1998

Flexible disk drive having head carriage locking mechanism

MITSUMI ELECTRIC CO LTD3 citations62

US7155731B2Dec 26, 2006

Optical disc drive having a function of preventing an optical disc from being pushed down by turbulence in the air flow generated by the rotation of the optical disc

MITSUMI ELECTRIC CO LTD2 citations60

US6868546B2Mar 15, 2005

Disk device

MITSUMI ELECTRIC CO LTD5 citations57

US6411467B2Jun 25, 2002

Large-capacity flexible disk and high-density type disk drive used therefor

MITSUMI ELECTRIC CO LTD0 citations52

US6391139B1May 21, 2002

Method of making a disk cartridge comprising an improved magnetic disk medium

MITSUMI ELECTRIC CO LTD1 citations52

US6366433B1Apr 2, 2002

Large-capacity magnetic disk drive having head load pressure adjustment

MITSUMI ELECTRIC CO LTD1 citations52

US6964057B2Nov 8, 2005

Case for disk device for reproducing or recording information

MITSUMI ELECTRIC CO LTD1 citations50

US6414819B1Jul 2, 2002

Floppy disk cartridge with concave portions formed in an upper or lower shell

MITSUMI ELECTRIC CO LTD0 citations45

US6091575AJul 18, 2000

Magnetic head support mechanism for a flexible disc drive

MITSUMI ELECTRIC CO LTD0 citations42

US6018440AJan 25, 2000

Flexible disk drive having a position detection unit for detecting a current position of a magnetic head

MITSUMI ELECTRIC CO LTD0 citations42

US6005752ADec 21, 1999

Magnetic data recording/reproducing device having a linear motor which includes a pair of coils integrally assembled with a carriage assembly on both sides thereof

MITSUMI ELECTRIC CO LTD0 citations42

UWABO TSUNEO

Patents

High-density flexible disk drive having a function of facilitating correct insertion of a large-capacity flexible disk thereinto without an insertion error

Large-capacity flexible disk and high-density type disk drive used therefor

Front structure for magnetic recording system

Data recording and reproducing device comprising a memory unit used for a memory card

Floppy disk drive

Disk device having movable cartridge holder and a cam plate having a cam groove with three successive inclined cam groove portions

High density flexible disk drive having a large capacity detecting switch provided at a position corresponding to a large capacity identifier hole provided in a case of a large capacity flexible disk

Disk device with improved movement mechanism

Magnetic disk drive having a position detection unit for detecting a current position of a magnetic head

Disk device with improved loading and unloading mechanism

Floppy disk drive

Magnetic disk

Magnetic disk drive

Flexible disk liner arrangement capable of preventing the ingress of dust

Floppy disk drive having dustproof structure for high capacity floppy disk

Floppy disk device with a pair of double-liners holding a floppy disk by the double-liner pair

Disk cartridge comprising an improved magnetic disk medium including an annular reinforcing member

Flexible disk comprising a supporting hub for supporting a magnetic recording medium inside of a bottom portion

Method of writing servo data and magnetic recording medium on which the servo data is written by the method

Magnetic disk drive with carriage lock lever locking mechanism

Servo writer for a large capacity floppy disk having an integrated direct-acting head carriage and actuator

High-density disk drive having a cover portion which protects a light weight head carriage from electromagnetic noise

Magnetic data recording/reproducing device with voice coil motor having center yoke back yoke with bent portions and permanent magnet arranged to generate magnetic fields

Flexible disk drive having head carriage locking mechanism

Optical disc drive having a function of preventing an optical disc from being pushed down by turbulence in the air flow generated by the rotation of the optical disc

Disk device

Large-capacity flexible disk and high-density type disk drive used therefor

Method of making a disk cartridge comprising an improved magnetic disk medium

Large-capacity magnetic disk drive having head load pressure adjustment

Case for disk device for reproducing or recording information

Floppy disk cartridge with concave portions formed in an upper or lower shell

Magnetic head support mechanism for a flexible disc drive

Flexible disk drive having a position detection unit for detecting a current position of a magnetic head

Magnetic data recording/reproducing device having a linear motor which includes a pair of coils integrally assembled with a carriage assembly on both sides thereof