Inventor · disambiguated record
Kenchi Ito
Also filed as: ITO KENCHI
61 granted patents·5 pending applications·1,128 citations·filing 1989–2018
99Inventor score
Top patents by PatentIndex Score
66 records- 0196US5481386AFlying type optical head integrally formed with light source and photodetector and optical disk apparatus with the sameHITACHI LTD·Filed 1994·Granted Jan 2, 1996·67 cites·8 claims
- 0295US9257483B2Magnetic memory, method of manufacturing the same, and method of driving the sameISHIGAKI TAKASHI·Filed 2011·Granted Feb 9, 2016·37 cites·12 claims
- 0395US6917088B2Magneto-resistive devicesHITACHI LTD·Filed 2002·Granted Jul 12, 2005·51 cites·20 claims
- 0492US7596014B2Semiconductor deviceHITACHI LTD·Filed 2007·Granted Sep 29, 2009·20 cites·11 claims
- 0592US5070488AOptical integrated circuit and optical apparatusFUKUSHIMA ATSUKO·Filed 1989·Granted Dec 3, 1991·108 cites·24 claims
- 0690US7253995B2Magnetic head and magnetic recording/reproducing deviceHITACHI LTD·Filed 2004·Granted Aug 7, 2007·29 cites·14 claims
- 0790US7209328B2Magnetic read head and hard disk driveHITACHI LTD·Filed 2004·Granted Apr 24, 2007·28 cites·14 claims
- 0890US5946281ALaminated proximity field optical head and optical information recording and reproducing deviceHITACHI LTD·Filed 1995·Granted Aug 31, 1999·64 cites·9 claims
- 0990US5871881AMultilayer optical information mediumHITACHI LTD·Filed 1996·Granted Feb 16, 1999·71 cites·69 claims
- 1088US6573586B2Semiconductor deviceHITACHI LTD·Filed 2002·Granted Jun 3, 2003·37 cites·8 claims
- 1187US7443718B2Magnetic memory deviceHITACHI LTD·Filed 2006·Granted Oct 28, 2008·18 cites·19 claims
- 1286US6876523B2Magnetic head, and the magnetic read-write devices, and the magnetic memory with magnetic sensorsHITACHI LTD·Filed 2002·Granted Apr 5, 2005·20 cites·18 claims
- 1386US6809908B1Light induction type thin film magnetic headHITACHI LTD·Filed 2000·Granted Oct 26, 2004·21 cites·24 claims
- 1485US7764538B2Magnetic memory and method for writing to magnetic memoryHITACHI LTD·Filed 2008·Granted Jul 27, 2010·13 cites·9 claims
- 1585US6611487B2Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the sameHITACHI LTD·Filed 2002·Granted Aug 26, 2003·14 cites·9 claims
- 1684US6934133B2Three terminal magnetic head having a magnetic semiconductor and a tunnel magnetoresistive film and magnetic recording apparatus including the headHITACHI LTD·Filed 2003·Granted Aug 23, 2005·18 cites·28 claims
- 1783US7436613B2Magnetic recording deviceHITACHI LTD·Filed 2007·Granted Oct 14, 2008·4 cites·7 claims
- 1883US7349186B2Magnetic read headHITACHI LTD·Filed 2004·Granted Mar 25, 2008·16 cites·9 claims
- 1983US7042669B2Method and apparatus for recording/reproducing magnetization informationHITACHI LTD·Filed 2004·Granted May 9, 2006·16 cites·15 claims
- 2080US5125740AMethod and apparatus for measuring optical constants of a thin film as well as method and apparatus for fabricating a thin film utilizing sameHITACHI LTD·Filed 1990·Granted Jun 30, 1992·54 cites·13 claims
- 2179US8427864B2Semiconductor storage deviceKAWAHARA TAKAYUKI·Filed 2010·Granted Apr 23, 2013·7 cites·9 claims
- 2279US7038881B2Magnetic head for perpendicular recording including a main pole having a pole tip with three tapered sidesHITACHI LTD·Filed 2003·Granted May 2, 2006·12 cites·15 claims
- 2379US6370107B1Recording medium and recording deviceHITACHI LTD·Filed 1999·Granted Apr 9, 2002·50 cites·13 claims
- 2478US10164174B2Magnetoresistance effect element and magnetic memoryUNIV TOHOKU·Filed 2018·Granted Dec 25, 2018·1 cites·25 claims
- 2578US6304527B1Near-field optical head and manufacturing method thereof and optical recording/readout system using near-field optical headHITACHI LTD·Filed 1999·Granted Oct 16, 2001·71 cites·24 claims
- 2677US6728080B2Magnetic head, magnetic recording and reproducing apparatus, method for reproducing and recording magnetic recording informationHITACHI LTD·Filed 2001·Granted Apr 27, 2004·10 cites·6 claims
- 2777US5715226AFlying type optical head integrally formed with light source and photodetector and optical disk apparatus with the sameHITACHI LTD·Filed 1995·Granted Feb 3, 1998·19 cites·17 claims
- 2876US7872906B2Unidirectional-current magnetization-reversal magnetoresistance element and magnetic recording apparatusHITACHI LTD·Filed 2008·Granted Jan 18, 2011·7 cites·20 claims
- 2976US7508625B2Magnetic recording deviceHITACHI LTD·Filed 2007·Granted Mar 24, 2009·2 cites·6 claims
- 3074US7755932B2Spin torque magnetic memory and offset magnetic field correcting method thereofHITACHI LTD·Filed 2008·Granted Jul 13, 2010·12 cites·15 claims
- 3173US7593253B2Semiconductor deviceHITACHI LTD·Filed 2007·Granted Sep 22, 2009·7 cites·20 claims
- 3272US5854870AShort-wavelength laser light sourceHITACHI LTD·Filed 1993·Granted Dec 29, 1998·37 cites·34 claims
- 3369US6185177B1Flying type optical head integrally formed with light source and photodetector and optical disk apparatus with the sameHITACHI LTD·Filed 2000·Granted Feb 6, 2001·4 cites·2 claims
- 3468US7675836B2Recording/reproducing apparatus with double-sided beam type probeHITACHI LTD·Filed 2005·Granted Mar 9, 2010·1 cites·10 claims
- 3568US6657830B2Magnetoresistive magnetic sensor with tunnel effect and magnetic storage apparatusHITACHI LTD·Filed 2001·Granted Dec 2, 2003·11 cites·22 claims
- 3666US9000546B2Spin-wave waveguide and spin wave operation circuitHITACHI LTD·Filed 2012·Granted Apr 7, 2015·1 cites·16 claims
- 3765US10658572B2Magnetoresistance effect element and magnetic memoryUNIV TOHOKU·Filed 2018·Granted May 19, 2020·0 cites·14 claims
- 3865US7787290B2Semiconductor deviceHITACHI LTD·Filed 2009·Granted Aug 31, 2010·4 cites·5 claims
- 3965US7778068B2Semiconductor deviceHITACHI LTD·Filed 2009·Granted Aug 17, 2010·2 cites·6 claims
- 4065US5734632AOptical head using evanescent light and optical data recording/reproducing apparatus and method of using the sameHITACHI LTD·Filed 1995·Granted Mar 31, 1998·18 cites·13 claims
- 4164US5195070AOptical information processing apparatus and optical pickup thereforHITACHI LTD·Filed 1990·Granted Mar 16, 1993·15 cites·48 claims
- 4263US9042165B2Magnetoresistive effect element, magnetic memory cell using same, and random access memoryIKEDA SHOJI·Filed 2011·Granted May 26, 2015·1 cites·8 claims
- 4363US5995474AFlying type optical head integrally formed with light source and photodetector and optical disk apparatus with the sameHITACHI LTD·Filed 1997·Granted Nov 30, 1999·16 cites·7 claims
- 4462US9602103B2Spin wave device and logic circuit using spin wave deviceHITACHI LTD·Filed 2013·Granted Mar 21, 2017·2 cites·15 claims
- 4562US5274727ASecond harmonic generator and method of fabrication thereofHITACHI LTD·Filed 1992·Granted Dec 28, 1993·25 cites·16 claims
- 4660US7554834B2Conduction control deviceHITACHI LTD·Filed 2006·Granted Jun 30, 2009·4 cites·30 claims
- 4760US6906368B2Magnetic recording medium and magnetic memory apparatusHITACHI LTD·Filed 2003·Granted Jun 14, 2005·9 cites·14 claims
- 4858US6917499B2Magnetoresistive magnetic sensor and magnetic storage apparatusHITACHI LTD·Filed 2003·Granted Jul 12, 2005·6 cites·17 claims
- 4958US6690526B2Magnetic head, magnetic recording and reproducing apparatus, method for reproducing and recording magnetic recording informationHITACHI LTD·Filed 2001·Granted Feb 10, 2004·5 cites·4 claims
- 5057US5191624AOptical information storing apparatus and method for production of optical deflectorHITACHI LTD·Filed 1991·Granted Mar 2, 1993·22 cites·18 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →