Inventor · disambiguated record
Earl A. Cunningham
Also filed as: CUNNINGHAM EARL A · CUNNINGHAM EARL ALBERT
48 granted patents·1,769 citations·filing 1979–2000
99Inventor score
Top patents by PatentIndex Score
48 records- 0198US5455723AMethod and apparatus for ramp load and unloadIBM·Filed 1994·Granted Oct 3, 1995·107 cites·15 claims
- 0295US4945427AMagnetic disk recording with variable track width and variable track densityIBM·Filed 1988·Granted Jul 31, 1990·63 cites·9 claims
- 0394US5920441AMethod and apparatus for controlling a multiple-stage actuator for a disk driveIBM·Filed 1995·Granted Jul 6, 1999·86 cites·5 claims
- 0494US5570247ASelf servo writing fileIBM·Filed 1995·Granted Oct 29, 1996·99 cites·7 claims
- 0594US5412518AIndividual MR transducer head/disk/channel adaptive bias current systemIBM·Filed 1993·Granted May 2, 1995·76 cites·13 claims
- 0693US6040955ASelf servo writing fileIBM·Filed 1994·Granted Mar 21, 2000·66 cites·6 claims
- 0793US4821125ACompensation of write current adn delta-V for recording component and radial positionIBM·Filed 1986·Granted Apr 11, 1989·72 cites·31 claims
- 0892US6760184B1Compact servo pattern optimized for M-R headsHITACHI GLOBAL STORAGE TECH·Filed 2000·Granted Jul 6, 2004·31 cites·39 claims
- 0992US6005742AMethod and apparatus for controlling a multiple-stage actuator for a disk driveIBM·Filed 1998·Granted Dec 21, 1999·65 cites·14 claims
- 1092US5949603ASelf servo writing file using the widest headIBM·Filed 1999·Granted Sep 7, 1999·70 cites·13 claims
- 1190US6023389AMethod and apparatus for writing servo bursts with compensation for erase bands in a direct access storage deviceIBM·Filed 1997·Granted Feb 8, 2000·63 cites·8 claims
- 1290US5936788AMethod and apparatus for ramp load and unloadIBM·Filed 1998·Granted Aug 10, 1999·47 cites·4 claims
- 1390US4516165AError recovery procedure using selective erasureIBM·Filed 1982·Granted May 7, 1985·37 cites·14 claims
- 1489US5287235ASlider air bearing surface with angled rail configurationIBM·Filed 1991·Granted Feb 15, 1994·53 cites·41 claims
- 1588US5790334ACircuit and method for optimizing bias supply in a magnetoresistive head based on the thermal properties of the MR head itselfIBM·Filed 1996·Granted Aug 4, 1998·53 cites·25 claims
- 1687US5831786ADisk drive having position sensor for ramp load and unload, and method for its useIBM·Filed 1997·Granted Nov 3, 1998·38 cites·10 claims
- 1786US5442492AData recovery procedure using DC offset and gain control for timing loop compensation for partial-response data detectionIBM·Filed 1993·Granted Aug 15, 1995·40 cites·15 claims
- 1885US5978163ACircuit and method for optimizing bias supply in a magnetoresistive head based on temperatureIBM·Filed 1996·Granted Nov 2, 1999·44 cites·17 claims
- 1985US4970609AClocking method and apparatus for use with partial response coded binary dataIBM·Filed 1988·Granted Nov 13, 1990·81 cites·29 claims
- 2085US4286296ATransducer positioning systemIBM·Filed 1979·Granted Aug 25, 1981·23 cites·17 claims
- 2184US5854722AMethod and apparatus for rotary actuator arc compensation correction in a direct access storage deviceIBM·Filed 1995·Granted Dec 29, 1998·43 cites·5 claims
- 2284US5379162ACustomized data recovery procedures selected responsive to readback errors and transducer head and disk parametersIBM·Filed 1993·Granted Jan 3, 1995·41 cites·9 claims
- 2383US5619387ADisk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patternsIBM·Filed 1996·Granted Apr 8, 1997·33 cites·7 claims
- 2483US5488524ASelf adaptive head for semi-contact recordingIBM·Filed 1993·Granted Jan 30, 1996·33 cites·13 claims
- 2582US4860138ADifferentially sensitive single track read/write head design with improved biasingIBM·Filed 1987·Granted Aug 22, 1989·26 cites·4 claims
- 2681US6043942ASelectable write precompensation in a direct access storage device (DASD)IBM·Filed 1997·Granted Mar 28, 2000·35 cites·12 claims
- 2781US4305080ACompensating driver circuit for thermal print headIBM·Filed 1979·Granted Dec 8, 1981·23 cites·4 claims
- 2878US5682274AMethod and apparatus for positioning transducers to correct for read and write element misregistration offsets which vary dependent on rotary actuator angular position across a disk mediumIBM·Filed 1995·Granted Oct 28, 1997·34 cites·18 claims
- 2977US5497111APeak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channelIBM·Filed 1994·Granted Mar 5, 1996·32 cites·13 claims
- 3076US4613915ATwin track vertical magnetic recording servo control method and apparatus with offset voltage compensationIBM·Filed 1985·Granted Sep 23, 1986·20 cites·7 claims
- 3171US5557482AMultipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errorsIBM·Filed 1994·Granted Sep 17, 1996·17 cites·4 claims
- 3269US6002540AMethod and apparatus for rotary actuator arc compensation correction in a direct access storage deviceIBM·Filed 1998·Granted Dec 14, 1999·20 cites·9 claims
- 3369US5790341AMethod and apparatus for reducing servo interference in a magneto-resistive head using skew between head and servo patternIBM·Filed 1995·Granted Aug 4, 1998·22 cites·25 claims
- 3467US5748415AMagnetoresistive head with a magnetoresistive film shaped to provide an improved read sensitivity profileIBM·Filed 1996·Granted May 5, 1998·20 cites·14 claims
- 3567US5559460APeak detection circuit for suppressing magnetoresistive thermal asperity transients in a data channelIBM·Filed 1995·Granted Sep 24, 1996·16 cites·1 claims
- 3665US6035351AStorage of user defined type file data in corresponding select physical formatIBM·Filed 1994·Granted Mar 7, 2000·41 cites·29 claims
- 3759US5923502AMagneto-resistive head including a selectively placed low-reluctance path between shieldsIBM·Filed 1995·Granted Jul 13, 1999·15 cites·14 claims
- 3857US6057977ACompact servo pattern optimized for M-R headsIBM·Filed 1997·Granted May 2, 2000·11 cites·19 claims
- 3956US4458280AServo writing transducer design and writing methodIBM·Filed 1982·Granted Jul 3, 1984·8 cites·6 claims
- 4055US6307705B1Method and apparatus for reducing track switch latency in a disk driveIBM·Filed 1993·Granted Oct 23, 2001·10 cites·41 claims
- 4155US5664319AMagnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturingIBM·Filed 1995·Granted Sep 9, 1997·10 cites·38 claims
- 4251US5245487ATransducer head for rigid disk driveIBM·Filed 1991·Granted Sep 14, 1993·8 cites·15 claims
- 4349US6014277AMultipath channel apparatus and method using offset parameters to compensate for amplitude and timing errors in data storage devicesIBM·Filed 1996·Granted Jan 11, 2000·7 cites·5 claims
- 4447US5783981AMagnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturingIBM·Filed 1995·Granted Jul 21, 1998·10 cites·18 claims
- 4543US5859739AMagnetic data reading apparatus and method using inductive and magnetoresistive headsIBM·Filed 1996·Granted Jan 12, 1999·6 cites·19 claims
- 4642US6079044AMethod and error correcting code (ECC) apparatus for storing predefined information with ECC in a direct access storage deviceIBM·Filed 1997·Granted Jun 20, 2000·9 cites·12 claims
- 4737US5790352AMagnetoresistive head with asymmetric leadsIBM·Filed 1997·Granted Aug 4, 1998·3 cites·17 claims
- 4834US5617289AMagnetic reinitialization of thin film magnetoresistive reproducing heads at the suspension level of media drive manufacturingIBM·Filed 1995·Granted Apr 1, 1997·2 cites·13 claims
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