Inventor · disambiguated record
Charles A. Park
Also filed as: PARK CHARLES A
23 granted patents·1,080 citations·filing 2001–2024
96Inventor score
Top patents by PatentIndex Score
23 records- 0198US7852592B1Spiral slope approximation of spiral patterns written to a disk of a disk driveWESTERN DIGITAL TECH INC·Filed 2008·Granted Dec 14, 2010·118 cites·20 claims
- 0298US7656604B1Disk drive demodulating a spiral track by finding a maximum correlation between a spiral track crossing signal and a time-shifted nominal spiral track crossing signalWESTERN DIGITAL TECH INC·Filed 2007·Granted Feb 2, 2010·125 cites·23 claims
- 0397US8634283B1Disk drive performing in-drive spiral track writingRIGNEY BRIAN P·Filed 2011·Granted Jan 21, 2014·116 cites·16 claims
- 0497US8634154B1Disk drive writing a sync mark seam in a bootstrap spiral trackRIGNEY BRIAN P·Filed 2011·Granted Jan 21, 2014·113 cites·24 claims
- 0597US7035026B2Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writerWESTERN DIGITAL TECH INC·Filed 2004·Granted Apr 25, 2006·115 cites·10 claims
- 0697US6885514B1Method of manufacturing and disk drive produced by measuring the read and write widths and varying the track pitch in the servo-writerWESTERN DIGITAL TECH INC·Filed 2001·Granted Apr 26, 2005·134 cites·11 claims
- 0796US8724245B1Disk drive employing overlapping servo zones to facilitate servo zone crossingSMITH STEVEN C·Filed 2012·Granted May 13, 2014·118 cites·22 claims
- 0895US8743504B1Servoing on zoned concentric servo sectors of a first disk surface to write a spiral servo track to a second disk surfaceBRYANT LAWRENCE M·Filed 2012·Granted Jun 3, 2014·100 cites·20 claims
- 0995US8498076B1Disk drive biasing timing recovery measurements for spiral tracks based on radial location of headSHEH EDGAR D·Filed 2010·Granted Jul 30, 2013·108 cites·20 claims
- 1094US11200912B1Data storage device with servo field dependent write boostWESTERN DIGITAL TECH INC·Filed 2021·Granted Dec 14, 2021·6 cites·20 claims
- 1188US12094503B1Continuous frequency servo in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2023·Granted Sep 17, 2024·2 cites·20 claims
- 1286US9245560B1Data storage device measuring reader/writer offset by reading spiral track and concentric servo sectorsWESTERN DIGITAL TECH INC·Filed 2015·Granted Jan 26, 2016·8 cites·14 claims
- 1384US9208810B1Data storage device attenuating interference from first spiral track when reading second spiral trackWESTERN DIGITAL TECH INC·Filed 2014·Granted Dec 8, 2015·6 cites·14 claims
- 1480US8982490B1Data storage device reading first spiral track while simultaneously writing second spiral trackWESTERN DIGITAL TECH INC·Filed 2014·Granted Mar 17, 2015·4 cites·14 claims
- 1573US8891191B1Data storage device initializing read signal gain to detect servo seed patternWESTERN DIGITAL TECH INC·Filed 2014·Granted Nov 18, 2014·2 cites·18 claims
- 1673US8861123B1Disk drive servoing on first disk surface while erasing second disk surfaceWESTERN DIGITAL TECH INC·Filed 2012·Granted Oct 14, 2014·4 cites·20 claims
- 1765US8917474B1Disk drive calibrating a velocity profile prior to writing a spiral trackRIGNEY BRIAN P·Filed 2011·Granted Dec 23, 2014·1 cites·18 claims
- 1857US12361968B1Servo interface circuitry for parallel self-servo writeWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·21 claims
- 1953US12354632B1Parallel self-servo write in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 8, 2025·0 cites·22 claims
- 2052US12361970B1Parallel self-servo write circuitry in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·20 claims
- 2150US12361965B1Preamplifier circuit for parallel self-servo writeWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·20 claims
- 2250US11482247B2Data storage device with history dependent write boostWESTERN DIGITAL TECH INC·Filed 2021·Granted Oct 25, 2022·0 cites·20 claims
- 2345US8896957B1Disk drive performing spiral scan of disk surface to detect residual dataWESTERN DIGITAL TECH INC·Filed 2013·Granted Nov 25, 2014·0 cites·22 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →