Inventor · disambiguated record
Hiroyuki Tsuchinaga
Also filed as: TSUCHINAGA HIROYUKI
30 granted patents·2 pending applications·1,005 citations·filing 1988–2010
98Inventor score
Top patents by PatentIndex Score
32 records- 0198US7502189B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2001·Granted Mar 10, 2009·156 cites·44 claims
- 0297US7486460B2Disk drive with enhanced storage capacity increase ratioHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Feb 3, 2009·66 cites·16 claims
- 0397US7440221B2Calibration of reader/writer offset in hard disk drive using shingled recordingHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Oct 21, 2008·39 cites·13 claims
- 0495US5513165AMethod for controlling the farm of a magnetic domain of a magneto-optical disk using pre-write testingHITACHI LTD·Filed 1993·Granted Apr 30, 1996·90 cites·23 claims
- 0595US4970707AOptical tape apparatus with a tracking control mechanism and/or a focusing control mechanismHITACHI LTD·Filed 1988·Granted Nov 13, 1990·64 cites·26 claims
- 0693US7372656B2disk drive with side erase controlHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted May 13, 2008·17 cites·20 claims
- 0793US5703855AOptical disk apparatus and recording and reading method for an optical disk using the sameHITACHI LTD·Filed 1994·Granted Dec 30, 1997·61 cites·7 claims
- 0892US5848045AMethod for recording and reading an optical diskHITACHI LTD·Filed 1997·Granted Dec 8, 1998·70 cites·14 claims
- 0990US5790482AOptical disk apparatus for recording information using a light intensity modulation method with a partial response detectorHITACHI LTD·Filed 1995·Granted Aug 4, 1998·62 cites·8 claims
- 1090US5457666ALight modulation method for forming a mark in magneto-optical recording systemHITACHI LTD·Filed 1993·Granted Oct 10, 1995·53 cites·25 claims
- 1187US7417821B2Information recording apparatusHITACHI GLOBAL STORAGE TECHNNO·Filed 2007·Granted Aug 26, 2008·13 cites·2 claims
- 1286US6654325B1Trial writing method and optical disk system using the sameHITACHI LTD·Filed 1999·Granted Nov 25, 2003·46 cites·6 claims
- 1384US7817367B2Apparatus, signal-processing circuit and device for magnetic recording systemHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 19, 2010·4 cites·52 claims
- 1483US5572503ACorrecting non-linear distortions of optical information with a non-linear equalizerHITACHI LTD·Filed 1994·Granted Nov 5, 1996·32 cites·13 claims
- 1582US7213195B2Data 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
- 1682US5497361AInformation reproducing apparatus with a DC level correcting capabilityHITACHI LTD·Filed 1993·Granted Mar 5, 1996·32 cites·12 claims
- 1781US6320834B1Data demodulating method and optical disk device using the methodHITACHI LTD·Filed 2000·Granted Nov 20, 2001·12 cites·3 claims
- 1880US5828636AOptical disk apparatus having optimized focus shift mechanism controlHITACHI LTD·Filed 1996·Granted Oct 27, 1998·34 cites·7 claims
- 1979US6215751B1Data demodulating method and optical disk device using the methodHITACHI LTD·Filed 1998·Granted Apr 10, 2001·28 cites·36 claims
- 2078US6785074B2Preamble pattern and magnetic recording system using the patternHITACHI LTD·Filed 2002·Granted Aug 31, 2004·10 cites·9 claims
- 2177US7024617B2Data decoding method and circuit and information recording and reproducing apparatus using the sameHITACHI LTD·Filed 2002·Granted Apr 4, 2006·10 cites·7 claims
- 2277US5463600AMagneto-optical recording system using recording waveform having a plurality of power levels providing high recording densityHITACHI LTD·Filed 1994·Granted Oct 31, 1995·40 cites·26 claims
- 2374US7612960B2Method for formatting data sectors on magnetic disk, and magnetic disk driveHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Nov 3, 2009·2 cites·16 claims
- 2474US5090005ATape recorder with means for sampling and holding focusing and tracking error signals during discontinuity of tape on surface of rotating drumHITACHI LTD·Filed 1989·Granted Feb 18, 1992·18 cites·20 claims
- 2562US5448544AData recording/playback apparatus and signal processing methodHITACHI LTD·Filed 1993·Granted Sep 5, 1995·13 cites·16 claims
- 2657US6477131B1Head amplifier and an optical disk device using the sameHITACHI LTD·Filed 1999·Granted Nov 5, 2002·10 cites·3 claims
- 2754US7227818B1Magneto-optical data recording/reproducing methodHITACHI LTD·Filed 1995·Granted Jun 5, 2007·11 cites·15 claims
- 2854US7142379B2Preamble pattern and magnetic recording system using the patternHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Nov 28, 2006·6 cites·15 claims
- 2945US8144415B2Apparatus, signal-processing circuit and device for magnetic recording systemSAWAGUCHI HIDEKI·Filed 2010·Granted Mar 27, 2012·0 cites·52 claims
- 3044US2003031099A1Head amplifier and an optical disk device using the sameFiled 2002·Application pending·0 cites
- 3142US7159166B2Error correction method, error correction circuit and information-recording/reproduction apparatusHITACHI GLOBAL STORAGE TECH·Filed 2003·Granted Jan 2, 2007·2 cites·9 claims
- 3239US2001043532A1Optical disc apparatusFiled 2001·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →