Assignee
SYQUEST TECHNOLOGY
US42 patents
Top patents by PatentIndex Score
US5444586AAug 22, 1995
Removable cartridge for a disk drive with a 1.8 inch form factor
SYQUEST TECHNOLOGY52 citations96
US4503474AMar 5, 1985
Disc drive cartridge arrangement
SYQUEST TECHNOLOGY56 citations96
US5523902AJun 4, 1996
Servo burst pattern for removing offset caused by magnetic distortion and method associated therewith
SYQUEST TECHNOLOGY116 citations95
US5422775AJun 6, 1995
31/2 inch removable cartridge for a disk drive
SYQUEST TECHNOLOGY45 citations95
US5317464AMay 31, 1994
Removable cartridge disk drive with cartridge interlocking and spindle motor telescoping mechanisms
SYQUEST TECHNOLOGY55 citations95
US5218503AJun 8, 1993
31/2 inch removable cartridge for a disk drive
SYQUEST TECHNOLOGY44 citations95
US4965685AOct 23, 1990
Removable cartridge disc drive with radial arm voice coil actuator
SYQUEST TECHNOLOGY76 citations95
US5262918ANov 16, 1993
Removable cartridge with a 2.5 inch form factor and an interlocking mechanism adapted for use in a disk drive
SYQUEST TECHNOLOGY49 citations94
US4864452ASep 5, 1989
Removable cartridge with lockable access door
SYQUEST TECHNOLOGY57 citations94
US4965691AOct 23, 1990
Sealed removable cartridge for use with a high density disc drive with magnetic clutch
SYQUEST TECHNOLOGY75 citations93
US4722012AJan 26, 1988
Disc drive arrangement for a hard disc cartridge having a carriage for accurately positioning a head relative to the cartridge
SYQUEST TECHNOLOGY62 citations93
US4683506AJul 28, 1987
Disc drive arrangement for a hard disc cartridge with a read/write head retract mechanism
SYQUEST TECHNOLOGY91 citations93
US4504879AMar 12, 1985
Disc drive arrangement
SYQUEST TECHNOLOGY72 citations93
US5831790ANov 3, 1998
Removable cartridge disk drive with a compact mechanism for engaging the disk cartridge and drive spindle motor
SYQUEST TECHNOLOGY17 citations92
US5724216AMar 3, 1998
Removable cartridge which may be mounted to a disk drive spindle motor without relative movement between the motor and a housing of the cartridge
SYQUEST TECHNOLOGY21 citations92
US5550685AAug 27, 1996
Applying an adaptive feed-forward algorithm as a frequency selective filter in a closed loop disk drive servo system in order to compensate for periodic perturbations which otherwise appear in the servo system position error signal
SYQUEST TECHNOLOGY153 citations92
US5535072AJul 9, 1996
Removable cartridge disk drive with cartridge interlocking and spindle motor telescoping mechanisms
SYQUEST TECHNOLOGY25 citations92
US5440436AAug 8, 1995
Removable cartridge disk drive with a 1.8 inch form factor
SYQUEST TECHNOLOGY22 citations92
US5280403AJan 18, 1994
31/2 inch removable cartridge for a disk drive
SYQUEST TECHNOLOGY36 citations92
US5175657ADec 29, 1992
Disc drive with magnetic coupling to a head actuator in a removable disc cartridge and with spindle motor rotor configured into the removable disc cartridge
SYQUEST TECHNOLOGY58 citations92
US5121280AJun 9, 1992
Zone servo sector format alignment scheme for servo and spindle motor control
SYQUEST TECHNOLOGY22 citations92
US4717981AJan 5, 1988
Hard disc cartridge arrangement with an automatically activated door
SYQUEST TECHNOLOGY43 citations92
US5822162AOct 13, 1998
Removable cartridge disk drive utilizing a registration contour in combination with a cartridge locking feature
SYQUEST TECHNOLOGY31 citations91
US5398141AMar 14, 1995
Removable cartridge disk drive with a 2.5 inch form factor utilizing a cartridge having a rotatable disk access door
SYQUEST TECHNOLOGY31 citations91
US4920462AApr 24, 1990
Disc drive fine servo velocity control and method for head positioning relative to a disc
SYQUEST TECHNOLOGY57 citations91
US4870518ASep 26, 1989
Removable cartridge disc drive with radial arm voice coil actuator
SYQUEST TECHNOLOGY54 citations91
US4864437ASep 5, 1989
Head loading velocity control
SYQUEST TECHNOLOGY81 citations91
US6118603ASep 12, 2000
Disk with fault-tolerant sample-data servo pattern
SYQUEST TECHNOLOGY34 citations90
US5400201AMar 21, 1995
Servo burst pattern for removing offset caused by magnetic distortion and method associated therewith
SYQUEST TECHNOLOGY29 citations90
US5777813AJul 7, 1998
Method and apparatus for reducing sideband interference when storing or retrieving data in a disk drive system adapted for downward compatibilty
SYQUEST TECHNOLOGY17 citations89
US4974103ANov 27, 1990
High density disc drive with magnetic clutch for use with a sealed removable cartridge
SYQUEST TECHNOLOGY44 citations89
US4630190ADec 16, 1986
Servo control apparatus for a disk drive
SYQUEST TECHNOLOGY44 citations87
US5886846AMar 23, 1999
Method for applying optimal seeking technique to disk file with excessive repeatable runout
SYQUEST TECHNOLOGY53 citations86
US4488187ADec 11, 1984
Servo control apparatus
SYQUEST TECHNOLOGY37 citations86
US6049444AApr 11, 2000
Rotatable door and door opening mechanism for a cartridge
SYQUEST TECHNOLOGY10 citations73
US5699210ADec 16, 1997
Disk drive for receiving a removable cartridge and method of inserting the cartridge
SYQUEST TECHNOLOGY14 citations73
US6243231B1Jun 5, 2001
Disk cartridge with anti-rattle mechanism
SYQUEST TECHNOLOGY9 citations69
US5038232AAug 6, 1991
Spindle motor control circuit
SYQUEST TECHNOLOGY11 citations68
US6333834B1Dec 25, 2001
Rattle reduction mechanism in a removable cartridge for a disk drive
SYQUEST TECHNOLOGY3 citations62
US6456456B1Sep 24, 2002
Removable cartridge disk drive with a receiver for receiving a cartridge housing a hard disk
SYQUEST TECHNOLOGY5 citations60
US6430005B1Aug 6, 2002
Removable cartridge disk drive with a receiver for receiving a cartridge housing a hard disk
SYQUEST TECHNOLOGY2 citations58
US5526212AJun 11, 1996
Technique for generating audible signals in a disk drive employing a voice coil actuator
SYQUEST TECHNOLOGY6 citations57