Inventor · disambiguated record
Hirofumi Sukeda
Also filed as: SUKEDA HIROFUMI
89 granted patents·1 pending application·1,436 citations·filing 1988–2010
99Inventor score
Top patents by PatentIndex Score
90 records- 0198US6649894B2Optical near field generatorHITACHI LTD·Filed 2002·Granted Nov 18, 2003·117 cites·20 claims
- 0298US6392985B2Optical reproduction apparatus for reproducing information from optical recording medium having wobbled address pitsHITACHI LTD·Filed 2001·Granted May 21, 2002·44 cites·1 claims
- 0397US6370106B2Optical reproduction apparatusHITACHI LTD·Filed 2001·Granted Apr 9, 2002·43 cites·1 claims
- 0497US5867455AOptical method and device for irradiating domains at predetermined positionsHITACHI LTD·Filed 1997·Granted Feb 2, 1999·117 cites·3 claims
- 0596US7283439B2Optical disk apparatus using mechanism for controlling spherical aberrationHITACHI LTD·Filed 2005·Granted Oct 16, 2007·25 cites·7 claims
- 0696US5898663AOptical recording medium with address information prepit for the same track at opposite boundaries of the same trackHITACHI LTD·Filed 1997·Granted Apr 27, 1999·61 cites·8 claims
- 0795US7260033B2Optical reproducing apparatusHITACHI LTD·Filed 2005·Granted Aug 21, 2007·20 cites·7 claims
- 0895US6925040B1Information recording method, information recording medium and information recording apparatusHITACHI LTD·Filed 2000·Granted Aug 2, 2005·33 cites·9 claims
- 0995US5959943AInformation recording medium with clock information thereinHITACHI LTD·Filed 1997·Granted Sep 28, 1999·69 cites·2 claims
- 1095US4894816AOptical information recording apparatusHITACHI LTD·Filed 1988·Granted Jan 16, 1990·68 cites·15 claims
- 1194US6256277B1Information recording apparatus having controlled recording energy generation circuitHITACHI LTD·Filed 1998·Granted Jul 3, 2001·84 cites·9 claims
- 1293US6160784ARecording a mark with the rising and falling edges varied based on previously recorded control dataHITACHI LTD·Filed 1999·Granted Dec 12, 2000·89 cites·13 claims
- 1392US7133230B2Recording head and information recording apparatusHITACHI LTD·Filed 2003·Granted Nov 7, 2006·40 cites·10 claims
- 1492US7079457B2Method of reproducing information with equalization coefficient for the reproduced informationHITACHI LTD·Filed 2003·Granted Jul 18, 2006·24 cites·21 claims
- 1592US6104685AInformation recording apparatusHITACHI LTD·Filed 1997·Granted Aug 15, 2000·48 cites·6 claims
- 1691US7012875B2Optical disk apparatus using focal shift signals to control spherical aberrationHITACHI LTD·Filed 2001·Granted Mar 14, 2006·27 cites·7 claims
- 1790US6603730B2Optical reproducing methodHITACHI LTD·Filed 2002·Granted Aug 5, 2003·12 cites·1 claims
- 1890US5790482AOptical 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
- 1989US7215609B2Optical reproducing apparatusHITACHI LTD·Filed 2002·Granted May 8, 2007·22 cites·17 claims
- 2089US6529466B2Information recording apparatusHITACHI LTD·Filed 2001·Granted Mar 4, 2003·17 cites·4 claims
- 2188US6480447B1Method of reproducing information using a selected equalization coefficient for each signalHITACHI LTD·Filed 2000·Granted Nov 12, 2002·17 cites·2 claims
- 2287US6683823B2Method for reproducing information on a recording mediumHITACHI LTD·Filed 2002·Granted Jan 27, 2004·22 cites·3 claims
- 2387US6188658B1Information recording apparatusHITACHI LTD·Filed 2000·Granted Feb 13, 2001·15 cites·2 claims
- 2486US6728197B2Optical disk having a plurality of information recording unitsHITACHI LTD·Filed 2001·Granted Apr 27, 2004·20 cites·14 claims
- 2586US6262968B1Optical information processing apparatusHITACHI LTD·Filed 2000·Granted Jul 17, 2001·8 cites·4 claims
- 2684US7349317B2Information recording method, information recording medium and information recording apparatusHITACHI LTD·Filed 2005·Granted Mar 25, 2008·3 cites·2 claims
- 2784US5982738AOptical recording medium having at least wobbled synchronous information shared between tracksHITACHI LTD·Filed 1996·Granted Nov 9, 1999·17 cites·11 claims
- 2883US6552994B2Optical reproduction apparatusHITACHI LTD·Filed 2002·Granted Apr 22, 2003·6 cites·5 claims
- 2983US6542456B2Optical reproducing methodHITACHI LTD·Filed 2002·Granted Apr 1, 2003·6 cites·1 claims
- 3083US6529470B2Optical recording medium with aligned prepit portionHITACHI LTD·Filed 2002·Granted Mar 4, 2003·6 cites·1 claims
- 3183US6483800B2Optical reproduction apparatus for reproducing information from an optical recording medium having wobbled pitsHITACHI LTD·Filed 2002·Granted Nov 19, 2002·6 cites·1 claims
- 3283US5572503ACorrecting non-linear distortions of optical information with a non-linear equalizerHITACHI LTD·Filed 1994·Granted Nov 5, 1996·32 cites·13 claims
- 3382US7099263B2Optical reproducing method for optical medium with aligned prepit portionHITACHI LTD·Filed 2005·Granted Aug 29, 2006·1 cites·5 claims
- 3482US5313448ALaser device driven by a periodic waveform optimized for reducing laser noiseHITACHI LTD·Filed 1992·Granted May 17, 1994·31 cites·17 claims
- 3581US6430146B1Optical reproducing methodHITACHI LTD·Filed 2002·Granted Aug 6, 2002·5 cites·5 claims
- 3681US6064644AOptical recording medium having particular arrangement of prepits and manufacturing method thereofHITACHI LTD·Filed 1998·Granted May 16, 2000·13 cites·6 claims
- 3780US6054199AOptical recording mediumHITACHI MAXELL·Filed 1997·Granted Apr 25, 2000·35 cites·6 claims
- 3879US6580685B2Optical recording medium with aligned prepit portionHITACHI LTD·Filed 2002·Granted Jun 17, 2003·4 cites·5 claims
- 3979US6549510B2Optical recording medium having grooves and landsHITACHI LTD·Filed 2002·Granted Apr 15, 2003·4 cites·1 claims
- 4079US6538981B2Optical reproduction apparatusHITACHI LTD·Filed 2002·Granted Mar 25, 2003·4 cites·1 claims
- 4179US6532207B2Optical reproducing methodHITACHI LTD·Filed 2002·Granted Mar 11, 2003·4 cites·5 claims
- 4279US6404716B1Information recording apparatusHITACHI LTD·Filed 2000·Granted Jun 11, 2002·8 cites·6 claims
- 4378US5315573ANon-linear optical saturable absorber layer in an optical disk to discriminate wavelength above or below a threshold level of intensityHITACHI LTD·Filed 1992·Granted May 24, 1994·26 cites·16 claims
- 4477US6430132B1Information recording apparatusHITACHI LTD·Filed 2000·Granted Aug 6, 2002·7 cites·2 claims
- 4577US5170383AMagneto-optical data recording systemHITACHI LTD·Filed 1989·Granted Dec 8, 1992·13 cites·23 claims
- 4676US6944105B2Method of reproducing information with equalization for the reproduced information to reduce inter-symbol interferenceHITACHI LTD·Filed 2002·Granted Sep 13, 2005·7 cites·1 claims
- 4775US6845081B2Optical reproducing method for optical medium with aligned prepit portionHITACHI LTD·Filed 2003·Granted Jan 18, 2005·3 cites·1 claims
- 4875US5270987AMagneto-optical recording and reproducing method, magneto-optical memory apparatus and magneto-optical recording medium thereforHITACHI LTD·Filed 1990·Granted Dec 14, 1993·22 cites·53 claims
- 4970US6545973B2Optical reproduction apparatusHITACHI LTD·Filed 2002·Granted Apr 8, 2003·2 cites·5 claims
- 5070US6538980B2Optical discHITACHI LTD·Filed 2002·Granted Mar 25, 2003·2 cites·8 claims
Showing the top 50 of 90 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →