Inventor
CUNNINGHAM EARL A
US27 patents
Patents
27 patentsUS5455723AOct 3, 1995
Method and apparatus for ramp load and unload
IBM107 citations99
US6023389AFeb 8, 2000
Method and apparatus for writing servo bursts with compensation for erase bands in a direct access storage device
IBM63 citations96
US4945427AJul 31, 1990
Magnetic disk recording with variable track width and variable track density
IBM63 citations96
US6040955AMar 21, 2000
Self servo writing file
IBM66 citations94
US5949603ASep 7, 1999
Self servo writing file using the widest head
IBM70 citations94
US5570247AOct 29, 1996
Self servo writing file
IBM99 citations94
US5412518AMay 2, 1995
Individual MR transducer head/disk/channel adaptive bias current system
IBM76 citations94
US4970609ANov 13, 1990
Clocking method and apparatus for use with partial response coded binary data
IBM81 citations94
US4860138AAug 22, 1989
Differentially sensitive single track read/write head design with improved biasing
IBM26 citations93
US4821125AApr 11, 1989
Compensation of write current adn delta-V for recording component and radial position
IBM72 citations93
US5619387AApr 8, 1997
Disk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patterns
IBM33 citations92
US5497111AMar 5, 1996
Peak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channel
IBM32 citations92
US5488524AJan 30, 1996
Self adaptive head for semi-contact recording
IBM33 citations92
US5442492AAug 15, 1995
Data recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detection
IBM40 citations91
US6035351AMar 7, 2000
Storage of user defined type file data in corresponding select physical format
IBM41 citations90
US5790341AAug 4, 1998
Method and apparatus for reducing servo interference in a magneto-resistive head using skew between head and servo pattern
IBM22 citations90
US4516165AMay 7, 1985
Error recovery procedure using selective erasure
IBM37 citations90
US5379162AJan 3, 1995
Customized data recovery procedures selected responsive to readback errors and transducer head and disk parameters
IBM41 citations87
US5287235AFeb 15, 1994
Slider air bearing surface with angled rail configuration
IBM53 citations87
US5559460ASep 24, 1996
Peak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channel
IBM16 citations82
US4613915ASep 23, 1986
Twin track vertical magnetic recording servo control method and apparatus with offset voltage compensation
IBM20 citations82
US4286296AAug 25, 1981
Transducer positioning system
IBM23 citations82
US5557482ASep 17, 1996
Multipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errors
IBM17 citations81
US4305080ADec 8, 1981
Compensating driver circuit for thermal print head
IBM23 citations79
US5245487ASep 14, 1993
Transducer head for rigid disk drive
IBM8 citations74
US4458280AJul 3, 1984
Servo writing transducer design and writing method
IBM8 citations74
US5617289AApr 1, 1997
Magnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturing
IBM2 citations57