Inventor · disambiguated record
Hideki Sawaguchi
Also filed as: SAWAGUCHI HIDEKI
46 granted patents·2 pending applications·899 citations·filing 1991–2010
98Inventor score
Files withHITACHI LTD29HITACHI GLOBAL STORAGE TECH16HITACHI GLOBAL STROAGE TECHNOL1SAWAGUCHI HIDEKI1YANG SHAOHUA1
Top patents by PatentIndex Score
48 records- 0198US7502189B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Mar 10, 2009·156 cites·44 claims
- 0296US7443625B2Magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 28, 2008·29 cites·10 claims
- 0395US7725800B2Decoding techniques for correcting errors using soft informationHITACHI GLOBAL STROAGE TECHNOL·Filed 2005·Granted May 25, 2010·60 cites·8 claims
- 0491US7590920B2Reduced complexity error correction encoding techniquesHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 15, 2009·26 cites·10 claims
- 0591US6657805B2Method of controlling read write operation of a magnetic disk apparatusHITACHI LTD·Filed 2001·Granted Dec 2, 2003·27 cites·7 claims
- 0691US5418660AInformation processing apparatus for processing reproduction signal having nonlinear characteristicsHITACHI LTD·Filed 1992·Granted May 23, 1995·58 cites·15 claims
- 0791US5325244AMagnetic recording data storage systemHITACHI LTD·Filed 1992·Granted Jun 28, 1994·55 cites·12 claims
- 0889US7865799B2Recording format for information date, information recording/reproducing cording circuitHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Jan 4, 2011·8 cites·3 claims
- 0988US6668349B1Data recording/readback method and data recording/readback device for the sameHITACHI LTD·Filed 2000·Granted Dec 23, 2003·22 cites·29 claims
- 1085US7545595B2Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angleHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 9, 2009·5 cites·1 claims
- 1185US7027248B2Magnetic disk apparatus having an adjustable mechanism to compensate write or heat element for off-tracking position with yaw angleHITACHI LTD·Filed 2003·Granted Apr 11, 2006·16 cites·21 claims
- 1284US7817367B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 19, 2010·4 cites·52 claims
- 1384US7259929B2Device and signal processing circuit for magnetic recording, magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 21, 2007·4 cites·14 claims
- 1484US5287228APeak detection method and apparatus thereforHITACHI LTD·Filed 1991·Granted Feb 15, 1994·36 cites·35 claims
- 1583US7436611B2Method of servo writing for magnetic recording system, magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 14, 2008·4 cites·23 claims
- 1683US7092181B2Magnetic recording apparatusHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Aug 15, 2006·4 cites·3 claims
- 1783US6912100B2Device and signal processing circuit for magnetic recording, magnetic recording apparatusHITACHI LTD·Filed 2004·Granted Jun 28, 2005·12 cites·26 claims
- 1883US6741412B2Data recording/reproducing signal processing circuit for magnetic recording, and perpendicular magnetic recording/reproducing apparatus using itHITACHI LTD·Filed 2001·Granted May 25, 2004·13 cites·16 claims
- 1983US6334201B1Decoding circuit and information processing apparatusHITACHI LTD·Filed 1998·Granted Dec 25, 2001·33 cites·7 claims
- 2083US5400189AMagnetic recording and reproducing apparatus, reproduction signal processing apparatus, and reproduction signal processing methodHITACHI LTD·Filed 1993·Granted Mar 21, 1995·33 cites·20 claims
- 2182US7213195B2Data decoding method and circuit and information recording and reproducing apparatus using the sameHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted May 1, 2007·4 cites·4 claims
- 2282US7075743B2Method of servo writing for magnetic recording system, magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Jul 11, 2006·12 cites·25 claims
- 2377US7024617B2Data decoding method and circuit and information recording and reproducing apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 4, 2006·10 cites·7 claims
- 2477US5881071ADigital write-and-read method and signal processing apparatusHITACHI LTD·Filed 1997·Granted Mar 9, 1999·30 cites·41 claims
- 2576US7076721B2Data recording/readback method and data recording/readback device for the sameHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jul 11, 2006·9 cites·14 claims
- 2673US7526710B2Recording format for information date, information recording/reproducing cording circuitHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Apr 28, 2009·16 cites·14 claims
- 2771US6327112B1Adjacent track position detectable information storage apparatusHITACHI LTD·Filed 1999·Granted Dec 4, 2001·22 cites·12 claims
- 2871US6310741B1Magnetic disk apparatus with data track reassigning functionHITACHI LTD·Filed 1999·Granted Oct 30, 2001·19 cites·13 claims
- 2969US7068462B2Magnetic recording apparatusHITACHI LTD·Filed 2002·Granted Jun 27, 2006·6 cites·9 claims
- 3068US6725418B2Decoding circuit using path sequence including feed-back type path sequence storing blocksHITACHI LTD·Filed 2001·Granted Apr 20, 2004·13 cites·2 claims
- 3166US6873665B2Digital magnetic recording/reproducing apparatusHITACHI LTD·Filed 2001·Granted Mar 29, 2005·12 cites·18 claims
- 3266US5594756ADecision feedback equalization circuitHITACHI LTD·Filed 1995·Granted Jan 14, 1997·19 cites·14 claims
- 3364US7839590B2Method of servo writing for magnetic recording system, magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Nov 23, 2010·0 cites·4 claims
- 3464US6337889B1Partial response demodulating method and apparatus using the sameHITACHI LTD·Filed 1998·Granted Jan 8, 2002·43 cites·16 claims
- 3563US5539588AMagnetic recording/reproducing with added intersymbol interference to obtain a partial-response codeHITACHI LTD·Filed 1994·Granted Jul 23, 1996·14 cites·28 claims
- 3662US5519398ASignal processing apparatus having A/D conversion functionHITACHI LTD·Filed 1993·Granted May 21, 1996·21 cites·19 claims
- 3757US5392316ADecoding method and apparatus with maximum likelihood sequence estimationHITACHI LTD·Filed 1993·Granted Feb 21, 1995·16 cites·22 claims
- 3854US8423873B2Decoding techniques for correcting errors using soft informationYANG SHAOHUA·Filed 2010·Granted Apr 16, 2013·1 cites·7 claims
- 3953US7526716B2Recording/regenerating device, method of encoding error correction, method of recording dataHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 28, 2009·3 cites·19 claims
- 4052US7057838B2Magnetic disk device having a write head to write by shifting in a radial directionHITACHI LTD·Filed 2003·Granted Jun 6, 2006·1 cites·17 claims
- 4149US5568330ARecording/reproducing apparatus with maximum likelihood sequence estimationHITACHI LTD·Filed 1994·Granted Oct 22, 1996·11 cites·20 claims
- 4245US8144415B2Apparatus, signal-processing circuit and device for magnetic recording systemSAWAGUCHI HIDEKI·Filed 2010·Granted Mar 27, 2012·0 cites·52 claims
- 4343US7296215B2Signal processing method and signal processing circuitHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Nov 13, 2007·2 cites·20 claims
- 4443US7046745B2Signal processing circuitHITACHI LTD·Filed 2001·Granted May 16, 2006·0 cites·14 claims
- 4542US2002003675A1Signal processing circuit free from erroneuos data and the information storage apparatus including the signal processing circuitHITACHI LTD·Filed 2001·Application pending·0 cites
- 4642US2001033444A1Signal processing circuit free from erroneous data and the information storage apparatus including the signal processing circuitHITACHI LTD·Filed 2001·Application pending·0 cites
- 4740US5467232AMagnetic recording and reproducing method using phase discrimination and apparatus thereforHITACHI LTD·Filed 1993·Granted Nov 14, 1995·4 cites·22 claims
- 4839US6320916B1Digital magnetic recording/reproducing apparatusHITACHI LTD·Filed 1998·Granted Nov 20, 2001·6 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →