Assignee
WESTERN DIGITAL CORP
US·225 granted patents·16,465 citations·filing 1975–2018
Top patents by PatentIndex Score
225 records- 0199US6262857B1Disk drive including a recording surface employing servo zones with banded data zonesWESTERN DIGITAL CORP·Filed 1998·Granted Jul 17, 2001·184 cites·3 claims
- 0299US6178056B1Disk drive employing state variable trap registers for providing stored servo and user data state variables to sampled-data channelWESTERN DIGITAL CORP·Filed 1999·Granted Jan 23, 2001·201 cites·4 claims
- 0399US5430859ASolid state memory system including plural memory chips and a serialized busWESTERN DIGITAL CORP·Filed 1991·Granted Jul 4, 1995·822 cites·26 claims
- 0498US6208477B1Hard disk drive having a built-in self-test for measuring non-linear signal distortionWESTERN DIGITAL CORP·Filed 1997·Granted Mar 27, 2001·221 cites·14 claims
- 0598US6191909B1Polling a preamplifier within a disk drive to remotely determine pre-established parametric valuesWESTERN DIGITAL CORP·Filed 2000·Granted Feb 20, 2001·136 cites·9 claims
- 0698US6091564ADisk drive with calibration bursts that are recorded on a spiral and method of recording the sameWESTERN DIGITAL CORP·Filed 1998·Granted Jul 18, 2000·225 cites·21 claims
- 0798US4922141APhase-locked loop delay lineWESTERN DIGITAL CORP·Filed 1988·Granted May 1, 1990·263 cites·31 claims
- 0898US4914529AData disk defect handling using relocation ID fieldsWESTERN DIGITAL CORP·Filed 1988·Granted Apr 3, 1990·159 cites·2 claims
- 0997US6198584B1Disk drive with staggered calibration bursts that are disposably located in data regions and method of using the same for calibrating a read headWESTERN DIGITAL CORP·Filed 1998·Granted Mar 6, 2001·146 cites·22 claims
- 1097US6145052ADisk drive with adaptive pooling for command reorderingWESTERN DIGITAL CORP·Filed 1997·Granted Nov 7, 2000·180 cites·26 claims
- 1197US6141175ARepeatable runout cancellation in sectored servo disk drive positioning systemWESTERN DIGITAL CORP·Filed 1997·Granted Oct 31, 2000·206 cites·21 claims
- 1297US6111717ADisk drive comprising a programmable preamplifier including a multiplexer for selecting between internal digital signals for output to a terminalWESTERN DIGITAL CORP·Filed 1998·Granted Aug 29, 2000·175 cites·16 claims
- 1397US6104153ADisk drive employing method of spinning down its spindle motor to reduce the time required for spinning it down and subsequently spinning it upWESTERN DIGITAL CORP·Filed 1999·Granted Aug 15, 2000·151 cites·8 claims
- 1497US6052076ADigital-to-analog converter having high resolution and high bandwidthWESTERN DIGITAL CORP·Filed 1998·Granted Apr 18, 2000·167 cites·11 claims
- 1597US5822142AMethod of mapping logical sectors to physical sectors in a disk drive sparing partitionWESTERN DIGITAL CORP·Filed 1996·Granted Oct 13, 1998·175 cites·2 claims
- 1697US5516212AHydrodynamic bearing with controlled lubricant pressure distributionWESTERN DIGITAL CORP·Filed 1995·Granted May 14, 1996·125 cites·32 claims
- 1797US5270887ACompact disk drive head disk assembly with conformable tape sealWESTERN DIGITAL CORP·Filed 1991·Granted Dec 14, 1993·91 cites·13 claims
- 1896US6249393B1Disk drive having a write condition detector for suspending write operations while a transducer flying height deviates from its operating flying heightWESTERN DIGITAL CORP·Filed 1998·Granted Jun 19, 2001·193 cites·23 claims
- 1996US6204988B1Disk drive capable of autonomously evaluating and adapting the frequency response of its servo control systemWESTERN DIGITAL CORP·Filed 1998·Granted Mar 20, 2001·146 cites·19 claims
- 2096US6195222B1Disk drive with seek profile selection based on a queued vs. non-queued environmentWESTERN DIGITAL CORP·Filed 1998·Granted Feb 27, 2001·148 cites·30 claims
- 2196US6105104AMethod and apparatus for optimizing the data transfer rate to and from a plurality of disk surfacesWESTERN DIGITAL CORP·Filed 1997·Granted Aug 15, 2000·172 cites·13 claims
- 2296US6092149ADisk drive cache system using a dynamic priority sequential stream of data segments continuously adapted according to prefetched sequential random, and repeating types of accessesWESTERN DIGITAL CORP·Filed 1997·Granted Jul 18, 2000·231 cites·20 claims
- 2396US6067206AMethod and apparatus to compensate for servo wedge rotational offset after a head switchWESTERN DIGITAL CORP·Filed 1997·Granted May 23, 2000·193 cites·16 claims
- 2496US5822143ADecision feedback equalization implementation of partial-response signaling in a magnetic recording channelWESTERN DIGITAL CORP·Filed 1996·Granted Oct 13, 1998·135 cites·42 claims
- 2596US4926291AData storage mounting assemblyWESTERN DIGITAL CORP·Filed 1989·Granted May 15, 1990·139 cites·14 claims
- 2695US6281652B1Method of using two low-resolution DACS for converting high-resolution digital demands into analog output signals that monotonically drive an actuator motor in a disk driveWESTERN DIGITAL CORP·Filed 2000·Granted Aug 28, 2001·128 cites·34 claims
- 2795US6263459B1On the fly write reallocationWESTERN DIGITAL CORP·Filed 1999·Granted Jul 17, 2001·149 cites·11 claims
- 2895US6246346B1Storage system employing high-rate code with constraint on run length between occurrences of an influential patternWESTERN DIGITAL CORP·Filed 1997·Granted Jun 12, 2001·139 cites·18 claims
- 2995US6198590B1Disk drive employing method of spinning down its spindle motor to reduce the time required for subsequently spinning it upWESTERN DIGITAL CORP·Filed 1998·Granted Mar 6, 2001·142 cites·6 claims
- 3095US6195218B1Disk drive which efficiently stores zone parameter sets for a plurality of disk surfacesWESTERN DIGITAL CORP·Filed 1998·Granted Feb 27, 2001·156 cites·23 claims
- 3195US6181502B1Faster access time in a disk drive by utilizing increased VCM potential voltageWESTERN DIGITAL CORP·Filed 1998·Granted Jan 30, 2001·116 cites·24 claims
- 3295US6160368AFaster spin-down operation in a disk drive by utilizing pulsed brakingWESTERN DIGITAL CORP·Filed 1998·Granted Dec 12, 2000·149 cites·35 claims
- 3395US6122133AHybrid method of determining a fractional track position of a read transducer in a hard disk driveWESTERN DIGITAL CORP·Filed 1998·Granted Sep 19, 2000·119 cites·31 claims
- 3495US6101065ADisk drive with seek profile selection based on read/write operationWESTERN DIGITAL CORP·Filed 1998·Granted Aug 8, 2000·145 cites·16 claims
- 3595US6014283ANon-quadrature servo burst pattern for micro-jogging a magnetoresistive head in a magnetic disk driveWESTERN DIGITAL CORP·Filed 1997·Granted Jan 11, 2000·121 cites·16 claims
- 3695US5661848AMulti-drive controller with encoder circuitry that generates ECC check bytes using the finite field for optical data for appending to data flowing to HDAWESTERN DIGITAL CORP·Filed 1994·Granted Aug 26, 1997·132 cites·20 claims
- 3795US5654840AHard disk drive which uses the back EMF of the actuator to detect shocksWESTERN DIGITAL CORP·Filed 1994·Granted Aug 5, 1997·93 cites·16 claims
- 3895US5455728ADisk drive employing compact magnetic actuator latch mechanismWESTERN DIGITAL CORP·Filed 1993·Granted Oct 3, 1995·66 cites·10 claims
- 3994US6243223B1Disk drive with servo burst phasing for improved linearity and off-track performance with a wide reading transducerWESTERN DIGITAL CORP·Filed 1998·Granted Jun 5, 2001·121 cites·7 claims
- 4094US6223303B1Disk drive having two tiered defect list comprising marginal and reserved data sectorsWESTERN DIGITAL CORP·Filed 1998·Granted Apr 24, 2001·283 cites·17 claims
- 4194US6185074B1Inertial latch having an interposer that prevents the head from leaving the ramp load during a shock eventWESTERN DIGITAL CORP·Filed 1998·Granted Feb 6, 2001·86 cites·20 claims
- 4294US6151197AWater slide suspension assembly having a stiffened vertically offset lift tabWESTERN DIGITAL CORP·Filed 1998·Granted Nov 21, 2000·98 cites·30 claims
- 4394US6122135ADisk drive with voice coil motor rise time managerWESTERN DIGITAL CORP·Filed 1997·Granted Sep 19, 2000·118 cites·28 claims
- 4494US6078452ADisk drive employing method of writing a data block to a data sector following a defective servo sectorWESTERN DIGITAL CORP·Filed 1998·Granted Jun 20, 2000·177 cites·21 claims
- 4594US6052250ADisk drive with separately determined servo and data track pitchWESTERN DIGITAL CORP·Filed 1997·Granted Apr 18, 2000·164 cites·1 claims
- 4694US6018789ADisk drive with cache segment providing adaptively managed chunksWESTERN DIGITAL CORP·Filed 1997·Granted Jan 25, 2000·168 cites·16 claims
- 4794US5212601ADisk drive data synchronizer with window shift synthesisWESTERN DIGITAL CORP·Filed 1991·Granted May 18, 1993·83 cites·36 claims
- 4893US5691994ADisk drive with fast error correction validationWESTERN DIGITAL CORP·Filed 1995·Granted Nov 25, 1997·106 cites·21 claims
- 4993US5390350AIntegrated circuit chip core logic system controller with power saving features for a microcomputer systemWESTERN DIGITAL CORP·Filed 1991·Granted Feb 14, 1995·112 cites·33 claims
- 5093US4062699AMethod for fabricating diffusion self-aligned short channel MOS deviceWESTERN DIGITAL CORP·Filed 1976·Granted Dec 13, 1977·65 cites·5 claims
Showing the top 50 of 225 patent records by PatentIndex Score.
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