Inventor · disambiguated record
John C. Purkett
Also filed as: PURKETT JOHN · PURKETT JOHN C · PURKETT JOHN CHARLES
22 granted patents·524 citations·filing 1994–2013
96Inventor score
Top patents by PatentIndex Score
22 records- 0197US7154690B1Dynamic shock detection in disk drive using accumulated average position errorMAXTOR CORP·Filed 2005·Granted Dec 26, 2006·40 cites·50 claims
- 0295US6882489B1Dynamic off-track detectorMAXTOR CORP·Filed 2000·Granted Apr 19, 2005·52 cites·43 claims
- 0394US5615064APulsed current velocity controlled head load method and apparatus which uses the back EMF to control the generation of head actuator driving pulsesIBM·Filed 1994·Granted Mar 25, 1997·89 cites·9 claims
- 0493US7253982B1Dynamic shock detection in disk drive using hair trigger timerMAXTOR CORP·Filed 2005·Granted Aug 7, 2007·16 cites·47 claims
- 0590US9070411B1Writable servo overlap zonesSEAGATE TECHNOLOGY LLC·Filed 2013·Granted Jun 30, 2015·18 cites·20 claims
- 0687US6332207B1Method of correcting a read error in a disk driveMAXTOR CORP·Filed 2000·Granted Dec 18, 2001·23 cites·20 claims
- 0786US7106542B1Method and apparatus for determining embedded runout correction values when self-servo writing or partial self-servo writing a disk driveMAXTOR CORP·Filed 2002·Granted Sep 12, 2006·26 cites·32 claims
- 0885US7561370B2Seam to seam embedded runout correction propagationSEAGATE TECHNOLOGY LLC·Filed 2007·Granted Jul 14, 2009·6 cites·20 claims
- 0984US7193807B1Method and apparatus for reducing effective track width through highly skewed head anglesMAXTOR CORP·Filed 2001·Granted Mar 20, 2007·26 cites·74 claims
- 1083US6147827AMethod of correcting read errors in a data storage system using targeted ECCMAXTOR CORP·Filed 1999·Granted Nov 14, 2000·34 cites·40 claims
- 1183US5760993AInformation storage device with an odd number of track sequences in a zoneIBM·Filed 1995·Granted Jun 2, 1998·33 cites·1 claims
- 1282US6606216B1Transducer head with separate data and servo read elementsMAXTOR CORP·Filed 1999·Granted Aug 12, 2003·35 cites·61 claims
- 1382US5596460ASystem and method for encoding a servo addressIBM·Filed 1994·Granted Jan 21, 1997·27 cites·6 claims
- 1479US6947249B1Method and apparatus for automatically determining an embedded runout correction thresholdMAXTOR CORP·Filed 2001·Granted Sep 20, 2005·13 cites·31 claims
- 1571US6084734AData recovery using targeted ECC correctionMAXTOR CORP·Filed 1997·Granted Jul 4, 2000·20 cites·31 claims
- 1669US6104558ASystem and method of encoding an index mark into a servo addressIBM·Filed 1998·Granted Aug 15, 2000·20 cites·5 claims
- 1768US6034837ADisk drive zoned sequential data format and head switch sequenceIBM·Filed 1997·Granted Mar 7, 2000·16 cites·4 claims
- 1862US5872673ADisk drive zoned sequential data format and head switch sequenceIBM·Filed 1998·Granted Feb 16, 1999·12 cites·3 claims
- 1956US5757568ASystem and method for encoding a servo addressIBM·Filed 1996·Granted May 26, 1998·10 cites·15 claims
- 2052US9998042B2Torque disturbance cancellation for a motorSEAGATE TECHNOLOGY LLC·Filed 2013·Granted Jun 12, 2018·1 cites·11 claims
- 2152US8891200B1Impedance mitigation of a microactuator conductive jointSEAGATE TECHNOLOGY LLC·Filed 2013·Granted Nov 18, 2014·0 cites·20 claims
- 2246US6219197B1Method and apparatus for servo positioning in a direct access storage device with a transducer read element width greater than ⅓ and less than ½ width of a data cylinderIBM·Filed 1996·Granted Apr 17, 2001·7 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →