Inventor · disambiguated record
Haruhiko Izumi
Also filed as: IZUMI HARUHIKO
34 granted patents·10 pending applications·620 citations·filing 1992–2012
98Inventor score
Top patents by PatentIndex Score
44 records- 0194US5661703AOptical recording medium having a non-volatile identification code and method for encoding data using sameFUJITSU LTD·Filed 1996·Granted Aug 26, 1997·95 cites·33 claims
- 0292US5347505AOptical medium recording method and apparatus employing pulse width delay and/or advancementFUJITSU LTD·Filed 1993·Granted Sep 13, 1994·62 cites·23 claims
- 0389US5680380AData readout system for optical disk having maximum likelihood data detecting circuitFUJITSU LTD·Filed 1994·Granted Oct 21, 1997·36 cites·39 claims
- 0487US5812501AOptical recording medium having a non-volatile identification code and method for encoding data using sameFUJITSU LTD·Filed 1997·Granted Sep 22, 1998·43 cites·8 claims
- 0586US5986987APRML readout system for optical diskFUJITSU LTD·Filed 1998·Granted Nov 16, 1999·36 cites·8 claims
- 0684US5235590ARead out apparatus for reading out information from magneto-optic diskFUJITSU LTD·Filed 1992·Granted Aug 10, 1993·38 cites·19 claims
- 0783US7430086B2Discrete track recording method, storage apparatus and method of producing storage apparatusFUJITSU LTD·Filed 2006·Granted Sep 30, 2008·5 cites·17 claims
- 0883US5691072AMagneto-optical recording medium and method of reproducing information recorded on such mediumFUJITSU LTD·Filed 1995·Granted Nov 25, 1997·36 cites·26 claims
- 0978US6507543B2Optical disk apparatus and galvano-mirror used for the sameFUJITSU LTD·Filed 2001·Granted Jan 14, 2003·13 cites·17 claims
- 1075US5675565AData reproduction method and apparatusFUJITSU LTD·Filed 1996·Granted Oct 7, 1997·26 cites·16 claims
- 1174US5610895AOptical head having light blocking means positioned in front of a detector for super-resolution detectionFUJITSU LTD·Filed 1996·Granted Mar 11, 1997·27 cites·10 claims
- 1272US5390156AMagneto-optic overwrite disk recording system for erasing and overwriting in a single passFUJITSU LTD·Filed 1993·Granted Feb 14, 1995·21 cites·6 claims
- 1371US6320832B1Laser power control in information recording deviceFUJITSU LTD·Filed 1999·Granted Nov 20, 2001·22 cites·13 claims
- 1467US5854775AMagneto-optic disk recording system having improved duty ratio controllerFUJITSU LTD·Filed 1996·Granted Dec 29, 1998·20 cites·6 claims
- 1566US5740154AMagnetooptical record medium having adjacent header signalsFUJITSU LTD·Filed 1997·Granted Apr 14, 1998·18 cites·9 claims
- 1664US5745464AEdge position data reproduction apparatusFUJITSU LTD·Filed 1997·Granted Apr 28, 1998·16 cites·12 claims
- 1762US8643970B2Magnetic recording apparatus and recording method of magnetic recording apparatusTAGAMI NAOKI·Filed 2012·Granted Feb 4, 2014·1 cites·12 claims
- 1862US5598392AData reproduction system synchronized by recording dataFUJITSU LTD·Filed 1994·Granted Jan 28, 1997·13 cites·9 claims
- 1959US6026064AHead driving apparatus and optical disk apparatusFUJITSU LTD·Filed 1997·Granted Feb 15, 2000·14 cites·20 claims
- 2055US6341102B1Data writing/reading apparatusFUJITSU LTD·Filed 1999·Granted Jan 22, 2002·11 cites·8 claims
- 2155US2010103554A1Media access method and magnetic storage apparatusFUJITSU LTD·Filed 2009·Application pending·0 cites
- 2254US6072754AMagneto-optical medium and reproducing device for the sameFUJITSU LTD·Filed 1999·Granted Jun 6, 2000·9 cites·2 claims
- 2353US5428594AMagneto-optic recording method and apparatus utilizing a two-state modulated light beamFUJITSU LTD·Filed 1992·Granted Jun 27, 1995·9 cites·11 claims
- 2453US2010123973A1Information storage medium and information storage apparatusFUJITSU LTD·Filed 2009·Application pending·0 cites
- 2552US6103407AMagneto-optical recording medium and method of using sameFUJITSU LTD·Filed 1998·Granted Aug 15, 2000·8 cites·14 claims
- 2651US2009237829A1Information recording mediumFUJITSU LTD·Filed 2008·Application pending·0 cites
- 2750US2008074773A1Clock extraction method for patterned medium, clock extraction circuit for patterned medium and patterned mediumFUJITSU LTD·Filed 2007·Application pending·0 cites
- 2850US2008074774A1Clock extraction method for patterned medium and circuit thereofFUJITSU LTD·Filed 2007·Application pending·0 cites
- 2949US6030716AMagneto-optical recording medium and method of reproducing information recorded on such mediumFUJITSU LTD·Filed 1997·Granted Feb 29, 2000·7 cites·40 claims
- 3049US5850377AData readout system for optical disk having maximum likehood data detecting circuitFUJITSU LTD·Filed 1997·Granted Dec 15, 1998·6 cites·2 claims
- 3147US2007211368A1Magnetic recording medium, magnetic recording apparatus, and servo demodulation circuitFUJITSU LTD·Filed 2006·Application pending·0 cites
- 3247US2009207523A1Magnetic recording medium and magnetic recording apparatusFUJITSU LTD·Filed 2009·Application pending·0 cites
- 3345US5359586ARead out apparatus for reading out information from magneto-optic diskFUJITSU LTD·Filed 1993·Granted Oct 25, 1994·6 cites·7 claims
- 3444US2012147497A1Magnetic recording medium and magnetic recording apparatusIZUMI HARUHIKO·Filed 2011·Application pending·0 cites
- 3543US8842392B2Magnetic recording medium and magnetic recording apparatusKASHIWAGI KAZUTO·Filed 2012·Granted Sep 23, 2014·0 cites·4 claims
- 3643US6272079B1Optical head unit for optical disk apparatus having both focus control and track control functionFUJITSU LTD·Filed 1998·Granted Aug 7, 2001·6 cites·11 claims
- 3742US2012229929A1Magnetic recording medium and magnetic reading apparatusIZUMI HARUHIKO·Filed 2012·Application pending·0 cites
- 3841US6741528B1Magneto-optical head deviceFUJITSU LTD·Filed 1999·Granted May 25, 2004·4 cites·15 claims
- 3941US5871855AMagneto-optical recording medium and method of using sameFUJITSU LTD·Filed 1995·Granted Feb 16, 1999·4 cites·8 claims
- 4039US2003123370A1Magneto-optical recording and reproducing apparatusFUJITSU LTD·Filed 2002·Application pending·0 cites
- 4136US5981016AMagneto-optical medium and reproducing device for the sameFUJITSU LTD·Filed 1997·Granted Nov 9, 1999·2 cites·2 claims
- 4235US5876858AMagneto-optical recording medium with magnetic film having large magnetic anisotropyFUJITSU LTD·Filed 1996·Granted Mar 2, 1999·2 cites·6 claims
- 4335US5859813AMagneto-optical recording method and apparatus to be used in the methodFUJITSU LTD·Filed 1997·Granted Jan 12, 1999·2 cites·9 claims
- 4434US5663936AMagneto-optic recording medium suited for mark edge recording system and having magnetic layer made of composition modulated materialFUJITSU LTD·Filed 1995·Granted Sep 2, 1997·2 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →