Inventor · disambiguated record
John Contreras
Also filed as: CONTRERAS JOHN · CONTRERAS JOHN T · CONTRERAS JOHN THOMAS
120 granted patents·11 pending applications·1,274 citations·filing 1992–2025
99Inventor score
Files withWESTERN DIGITAL TECH INC42HGST Netherlands BV32CONTRERAS JOHN THOMAS12IBM12HITACHI GLOBAL STORAGE TECH10
Top patents by PatentIndex Score
131 records- 0197US8233240B2Magnetic recording disk drive with integrated lead suspension having multiple segments for optimal characteristic impedanceCONTRERAS JOHN THOMAS·Filed 2009·Granted Jul 31, 2012·38 cites·10 claims
- 0297US8154827B2Integrated lead suspension with multiple crossover coplanar connection of the electrically conductive tracesCONTRERAS JOHN THOMAS·Filed 2008·Granted Apr 10, 2012·40 cites·14 claims
- 0397US8049984B2Integrated slider bias controlHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Nov 1, 2011·38 cites·15 claims
- 0496US8446690B2Perpendicular magnetic recording write head with spin torque oscillator for fast switching of write pole magnetizationALEX MICHAEL·Filed 2009·Granted May 21, 2013·52 cites·14 claims
- 0596US8116031B2Perpendicular magnetic recording system with helical write coil and auxiliary coil for fast switching of write pole magnetizationALEX MICHAEL·Filed 2009·Granted Feb 14, 2012·36 cites·20 claims
- 0695US10424323B1High-bandwidth STO bias architecture with integrated slider voltage potential controlWESTERN DIGITAL TECH INC·Filed 2018·Granted Sep 24, 2019·13 cites·20 claims
- 0795US8705323B2TAR temperature sensor having faster response timeHGST Netherlands BV·Filed 2012·Granted Apr 22, 2014·30 cites·12 claims
- 0895US8351155B2Perpendicular magnetic recording system with spin torque oscillator and control circuitry for fast switching of write pole magnetizationHITACHI GLOBAL STORAGE TECH NL·Filed 2009·Granted Jan 8, 2013·25 cites·9 claims
- 0995US8305712B2Tunable microstrip signal transmission path in a hard disk driveCONTRERAS JOHN T·Filed 2009·Granted Nov 6, 2012·27 cites·20 claims
- 1095US8189281B2Magnetic recording disk drive with write driver to write head transmission line having non-uniform sections for optimal write current pulse overshootALEX MICHAEL·Filed 2009·Granted May 29, 2012·27 cites·12 claims
- 1194US9047926B2Dual thermal sensor for HAMR waveguide power monitor and integration with the contact sensorHGST Netherlands BV·Filed 2013·Granted Jun 2, 2015·24 cites·21 claims
- 1294US8599506B2Integrating control of slider bias potential, touch-down detection and fly-height determination in a HDDCONTRERAS JOHN·Filed 2009·Granted Dec 3, 2013·28 cites·18 claims
- 1394US8570684B1Implementing integrated spin-torque oscillator and interface bias control for hard disk drivesHGST Netherlands BV·Filed 2012·Granted Oct 29, 2013·25 cites·22 claims
- 1494US7830634B2Head-disk contact detection and work function difference determinationHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Nov 9, 2010·20 cites·9 claims
- 1594US7660068B1Method and system for pre-contact detection and active damping of air bearing vibrations in a hard disk driveHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Feb 9, 2010·21 cites·25 claims
- 1694US7352535B2Method and apparatus for reducing crosstalk and signal loss in flexing interconnects of an electrical lead suspensionHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 1, 2008·19 cites·26 claims
- 1793US11874182B1Alternating-bias signal resistance detection for resistive temperature detectors in disk drivesWESTERN DIGITAL TECH INC·Filed 2022·Granted Jan 16, 2024·1 cites·24 claims
- 1893US9001444B1Implementing spin torque oscillator power-on oscillation checker for microwave-assisted magnetic recording hard disk drivesHGST Netherlands BV·Filed 2014·Granted Apr 7, 2015·23 cites·17 claims
- 1993US8917465B1Implementing spin torque oscillator power-on oscillation checker using ramped STO bias differentiator in microwave-assisted magnetic recording (MAMR) hard disk drivesHGST Netherlands BV·Filed 2014·Granted Dec 23, 2014·22 cites·20 claims
- 2093US8842383B1Laser power sensor with dual temperature sensorHGST Netherlands BV·Filed 2013·Granted Sep 23, 2014·19 cites·20 claims
- 2193US8179633B2Perpendicular magnetic recording system and write head with transverse auxiliary pole for fast switching of write pole magnetizationCONTRERAS JOHN THOMAS·Filed 2009·Granted May 15, 2012·15 cites·12 claims
- 2292US9117474B1Implementing write head device for contact detection and spacing sensingHGST Netherlands BV·Filed 2014·Granted Aug 25, 2015·18 cites·20 claims
- 2392US9099128B1Implementing noise based detection of spin torque oscillator power-on in microwave-assisted magnetic recording (MAMR) hard disk drivesHGST Netherlands BV·Filed 2014·Granted Aug 4, 2015·17 cites·20 claims
- 2492US8098450B2Fly-height management in a hard disk drive (HDD)BAUMGART PETER·Filed 2009·Granted Jan 17, 2012·40 cites·20 claims
- 2590US11087784B2Data storage devices with integrated slider voltage potential controlWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 10, 2021·3 cites·20 claims
- 2690US10950265B1Data storage device configured with manufacture PCB for concurrent write/read operationWESTERN DIGITAL TECH INC·Filed 2020·Granted Mar 16, 2021·6 cites·20 claims
- 2790US10891973B2High-bandwidth STO bias architecture with integrated slider voltage potential controlWESTERN DIGITAL TECH INC·Filed 2020·Granted Jan 12, 2021·3 cites·20 claims
- 2889US10461965B1Active low-power terminationWESTERN DIGITAL TECH INC·Filed 2018·Granted Oct 29, 2019·7 cites·20 claims
- 2989US8804263B1DC-offset adjustment for balanced embedded contact sensorHGST Netherlands BV·Filed 2013·Granted Aug 12, 2014·10 cites·20 claims
- 3089US7545608B2Current-perpendicular-to-the-plane (CPP) magnetoresistive sensor with impedance adjustmentHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 9, 2009·12 cites·16 claims
- 3188US10468073B2Transmission line optimization for multi-die systemsSANDISK TECHNOLOGIES LLC·Filed 2017·Granted Nov 5, 2019·6 cites·23 claims
- 3288US9717140B2Shielded patterned ground structure filter for EMI reductionWESTERN DIGITAL TECH INC·Filed 2015·Granted Jul 25, 2017·6 cites·33 claims
- 3388US8598460B2Interleaved conductor structure with offset tracesCONTRERAS JOHN T·Filed 2010·Granted Dec 3, 2013·11 cites·32 claims
- 3488US8045297B2Flex cable and method for lowering flex cable impedanceHITACHI GLOBAL STORAGE TECH NL·Filed 2008·Granted Oct 25, 2011·8 cites·23 claims
- 3587US10411670B2Compact broadband common-mode filterWESTERN DIGITAL TECH INC·Filed 2017·Granted Sep 10, 2019·5 cites·23 claims
- 3687US9218822B1Disk drive with preamplifier with isolation for multiple readers in a slider with a common return signalHGST Netherlands BV·Filed 2015·Granted Dec 22, 2015·9 cites·13 claims
- 3787US8482872B1Distributed temperature detector architecture for head disk interface systemsCONTRERAS JOHN THOMAS·Filed 2011·Granted Jul 9, 2013·9 cites·19 claims
- 3887US8310789B2Conductor suspension structure and electrical connection assembly for transmitting complementary signals in a hard disk driveCONTRERAS JOHN T·Filed 2009·Granted Nov 13, 2012·8 cites·20 claims
- 3987US6201653B1By-pass write drivers for high-performance data recordingIBM·Filed 1998·Granted Mar 13, 2001·48 cites·42 claims
- 4086US7667914B2Direct coupled wide-bandwidth front-end with smart bias control amplifierHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Feb 23, 2010·7 cites·14 claims
- 4186US5969523APreamplifier bias mode to re-initialize a GMR head after losing initializationIBM·Filed 1997·Granted Oct 19, 1999·47 cites·17 claims
- 4285US9111561B1Magnetic recording disk drive with write current overshoot amplitude (OSA) responsive to data transitionsHGST Netherlands BV·Filed 2014·Granted Aug 18, 2015·7 cites·15 claims
- 4385US5822141AHigh speed FET write driver for an inductive headIBM·Filed 1996·Granted Oct 13, 1998·47 cites·38 claims
- 4484US11362063B2Semiconductor device with die-skipping wire bondsWESTERN DIGITAL TECH INC·Filed 2018·Granted Jun 14, 2022·4 cites·29 claims
- 4584US8988829B1Disk drive with preamplifier for multiple readers in a slider with a common return signalHGST Netherlands BV·Filed 2014·Granted Mar 24, 2015·6 cites·16 claims
- 4684US8310902B1Signal-extraction laser-pulse system architecture for thermally-assisted magnetic recordingCONTRERAS JOHN THOMAS·Filed 2011·Granted Nov 13, 2012·7 cites·16 claims
- 4784US8116032B2Perpendicular magnetic recording system with auxiliary coil and circuitry for fast switching of write pole magnetizationCONTRERAS JOHN THOMAS·Filed 2009·Granted Feb 14, 2012·5 cites·16 claims
- 4883US11615804B1Disk drive biasing two write assist elements using three terminal control circuitryWESTERN DIGITAL TECH INC·Filed 2020·Granted Mar 28, 2023·2 cites·15 claims
- 4983US9837106B1Two-dimensional magnetic recording (TDMR) disk drive with multiple sensors and circuitry for selection of an active pair of associated amplifiersWESTERN DIGITAL TECH INC·Filed 2017·Granted Dec 5, 2017·6 cites·21 claims
- 5083US8730607B1Thermoelectric voltage-based differential contact sensorHGST Netherlands BV·Filed 2012·Granted May 20, 2014·6 cites·16 claims
Showing the top 50 of 131 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →