Inventor · disambiguated record
Richard Leo Galbraith
Also filed as: GALBRAITH RICHARD · GALBRAITH RICHARD L · GALBRAITH RICHARD LEO
138 granted patents·6 pending applications·2,929 citations·filing 1989–2024
99Inventor score
Files withWESTERN DIGITAL TECH INC51IBM41HITACHI GLOBAL STORAGE TECH21HGST Netherlands BV9GALBRAITH RICHARD LEO5
Top patents by PatentIndex Score
144 records- 0199US6895547B2Method and apparatus for low density parity check encoding of dataIBM·Filed 2001·Granted May 17, 2005·341 cites·14 claims
- 0299US6720698B2Electrical pulse generator using pseudo-random pole distributionIBM·Filed 2002·Granted Apr 13, 2004·199 cites·70 claims
- 0398US4993029AMethod and apparatus for randomizing data in a direct access storage deviceIBM·Filed 1989·Granted Feb 12, 1991·191 cites·26 claims
- 0497US10417089B2Data storage device extending erasures for LDPC-type decodingWESTERN DIGITAL TECH INC·Filed 2018·Granted Sep 17, 2019·26 cites·21 claims
- 0597US7675703B2Magnetic recording disk drive with patterned media and system for clocking write dataHITACHI GLOBAL STORAGE TECH·Filed 2007·Granted Mar 9, 2010·40 cites·15 claims
- 0697US5233482AThermal asperity compensation for PRML data detectionIBM·Filed 1991·Granted Aug 3, 1993·130 cites·17 claims
- 0796US10236070B2Read level tracking and optimizationWESTERN DIGITAL TECH INC·Filed 2017·Granted Mar 19, 2019·14 cites·25 claims
- 0896US9632863B2Track error-correcting code extensionHGST Netherlands BV·Filed 2015·Granted Apr 25, 2017·19 cites·61 claims
- 0996US9059737B2Disk drive with distributed codeword blocksHGST Netherlands BV·Filed 2013·Granted Jun 16, 2015·27 cites·17 claims
- 1096US7206146B2Biphase magnetic pattern detector using multiple matched filters for hard disk driveHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Apr 17, 2007·69 cites·19 claims
- 1196US7071851B1Techniques for implementing non-uniform constraints in modulation encoded dataHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jul 4, 2006·46 cites·20 claims
- 1296US7030789B1Techniques for applying modulation constraints to data using periodically changing symbol mappingsHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Apr 18, 2006·71 cites·25 claims
- 1395US10530391B2Non-binary encoding for non-volatile memoryWESTERN DIGITAL TECH INC·Filed 2017·Granted Jan 7, 2020·10 cites·20 claims
- 1495US8654465B2Implementing spin-torque oscillator sensing with enhanced demodulator for hard disk drivesBRAGANCA PATRICK MESQUITA·Filed 2011·Granted Feb 18, 2014·37 cites·14 claims
- 1595US8553346B2Implementing spin-torque oscillator sensing with enhanced delay control feedback circuit for hard disk drivesBRAGANCA PATRICK MESQUITA·Filed 2011·Granted Oct 8, 2013·37 cites·20 claims
- 1695US8422303B2Early degradation detection in flash memory using test cellsFRANCA-NETO LUIZ M·Filed 2010·Granted Apr 16, 2013·26 cites·18 claims
- 1795US7733591B2Data storage device with data recovery process using fixed phase clocking for analog-to-digital conversionHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 8, 2010·26 cites·17 claims
- 1895US7725800B2Decoding techniques for correcting errors using soft informationHITACHI GLOBAL STROAGE TECHNOL·Filed 2005·Granted May 25, 2010·60 cites·8 claims
- 1995US5168413ATransducer head flying height monitoring methods and apparatus for disk drive systemIBM·Filed 1990·Granted Dec 1, 1992·109 cites·18 claims
- 2094US12099409B2Adjustable code rates and dynamic ECC in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2022·Granted Sep 24, 2024·3 cites·26 claims
- 2194US8037394B2Techniques for generating bit reliability information in a post-processor using an error correction constraintHITACHI GLOBAL STORAGE TECH NL·Filed 2007·Granted Oct 11, 2011·38 cites·20 claims
- 2294US6901119B2Method and apparatus for implementing soft-input/soft-output iterative detectors/decodersIBM·Filed 2001·Granted May 31, 2005·64 cites·21 claims
- 2394US6460150B1Noise-predictive post-processing for PRML data channelIBM·Filed 2000·Granted Oct 1, 2002·47 cites·13 claims
- 2494US5220466AMethod and apparatus for digital filter control in a partial-response maximum-likelihood disk drive systemIBM·Filed 1991·Granted Jun 15, 1993·76 cites·12 claims
- 2593US11764813B1Extendable parity code matrix construction and utilization in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2022·Granted Sep 19, 2023·3 cites·21 claims
- 2693US8570677B2Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drivesBRAGANCA PATRICK MESQUITA·Filed 2011·Granted Oct 29, 2013·27 cites·17 claims
- 2793US6937415B2Method and apparatus for enhanced data channel performance using read sample bufferingHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Aug 30, 2005·37 cites·16 claims
- 2892US11677420B1Externalizing inter-symbol interference data in a data channelWESTERN DIGITAL TECH INC·Filed 2022·Granted Jun 13, 2023·3 cites·20 claims
- 2992US11049520B1Data storage device employing multi-tier coding for magnetic tapeWESTERN DIGITAL TECH INC·Filed 2020·Granted Jun 29, 2021·4 cites·18 claims
- 3092US7193802B2Apparatus for providing dynamic equalizer optimizationHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Mar 20, 2007·34 cites·32 claims
- 3191US7590920B2Reduced complexity error correction encoding techniquesHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 15, 2009·26 cites·10 claims
- 3291US6625235B1Apparatus and method for noise-predictive maximum likelihood detectionIBM·Filed 1997·Granted Sep 23, 2003·68 cites·17 claims
- 3391US6557124B1Method and system for encoding data for high performance error controlIBM·Filed 2000·Granted Apr 29, 2003·36 cites·18 claims
- 3491US5255131AAsynchronous servo identification/address mark detection for PRML disk drive ssytemIBM·Filed 1992·Granted Oct 19, 1993·52 cites·15 claims
- 3590US11101006B2Read level tracking and optimizationWESTERN DIGITAL TECH INC·Filed 2020·Granted Aug 24, 2021·2 cites·20 claims
- 3690US9036304B1System and methods utilizing dual read sensorsHGST Netherlands BV·Filed 2014·Granted May 19, 2015·11 cites·23 claims
- 3790US7424074B2Optimizing detector target polynomials in read/write channels to achieve best error rate performance in disk drivesHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 9, 2008·10 cites·29 claims
- 3890US7193800B2Data recording medium with servo pattern having pseudo-noise sequencesHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Mar 20, 2007·27 cites·15 claims
- 3989US5619539AData detection methods and apparatus for a direct access storage deviceIBM·Filed 1994·Granted Apr 8, 1997·47 cites·21 claims
- 4089US5438460AAsynchronous gain adjustment for PRML disk drive systemsIBM·Filed 1994·Granted Aug 1, 1995·45 cites·12 claims
- 4189US5196849AMethod and apparatus for implementing PRML codes with maximum onesIBM·Filed 1992·Granted Mar 23, 1993·48 cites·16 claims
- 4288US6643814B1Maximum transition run encoding and decoding systemsIBM·Filed 2000·Granted Nov 4, 2003·47 cites·49 claims
- 4388US5392295AError measurement circuitIBM·Filed 1992·Granted Feb 21, 1995·44 cites·29 claims
- 4487US11656789B2Asymmetric read senseWESTERN DIGITAL TECH INC·Filed 2021·Granted May 23, 2023·2 cites·20 claims
- 4587US10748628B2Read level tracking and optimizationWESTERN DIGITAL TECHNOLOGIES INC·Filed 2019·Granted Aug 18, 2020·3 cites·20 claims
- 4686US9818440B1Heat assisted magnetic recording system having at least three possible magnetic configurations per physical bitHGST Netherlands BV·Filed 2016·Granted Nov 14, 2017·7 cites·23 claims
- 4786US9437232B1Magnetic recording disk drive with write position error signal values written in the data tracks for compensation of track misregistrationHGST Netherlands BV·Filed 2015·Granted Sep 6, 2016·8 cites·20 claims
- 4886US5357520AMethod and apparatus for precompensation value determination in a PRML data channelIBM·Filed 1992·Granted Oct 18, 1994·42 cites·6 claims
- 4986US5258940ADistributed arithmetic digital filter in a partial-response maximum-likelihood disk drive systemIBM·Filed 1992·Granted Nov 2, 1993·43 cites·12 claims
- 5084US11138996B1Data storage device employing embedded servo sectors for magnetic tapeWESTERN DIGITAL TECH INC·Filed 2020·Granted Oct 5, 2021·2 cites·7 claims
Showing the top 50 of 144 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →