Inventor · disambiguated record
Takuji Ogawa
Also filed as: OGAWA TAKUJI
21 granted patents·6 pending applications·406 citations·filing 1986–2025
95Inventor score
Top patents by PatentIndex Score
27 records- 0196US5173819ADisk apparatus having an improved cooling structureHITACHI LTD·Filed 1991·Granted Dec 22, 1992·180 cites·3 claims
- 0295US7057981B2Disk array system and method for controlling disk array systemHITACHI LTD·Filed 2004·Granted Jun 6, 2006·33 cites·14 claims
- 0394US4881136AMethod and apparatus for detecting minute defects on magnetic disk by monitoring both amplitude decrease and phase shift of a reproduced signalHITACHI LTD·Filed 1986·Granted Nov 14, 1989·65 cites·6 claims
- 0491US7200074B2Disk array system and method for controlling disk array systemHITACHI LTD·Filed 2004·Granted Apr 3, 2007·21 cites·48 claims
- 0588US6490123B1Disc drive having 3.5 inch form factor housing and 2.5 inch form factor disk mediaHITACHI LTD·Filed 1998·Granted Dec 3, 2002·43 cites·4 claims
- 0684US8468300B2Storage system having plural controllers and an expansion housing with drive unitsKANO AZUMA·Filed 2010·Granted Jun 18, 2013·5 cites·51 claims
- 0783US7203135B2Disk array system and method for controlling disk array systemHITACHI LTD·Filed 2004·Granted Apr 10, 2007·10 cites·23 claims
- 0882US7453774B2Disk array systemHITACHI LTD·Filed 2004·Granted Nov 18, 2008·9 cites·68 claims
- 0974US7447121B2Disk array systemHITACHI LTD·Filed 2007·Granted Nov 4, 2008·1 cites·26 claims
- 1070US8037245B2Storage systemHITACHI LTD·Filed 2008·Granted Oct 11, 2011·4 cites·12 claims
- 1167US5109311AMagnetic disk device and method of recording/retrieving informationHITACHI LTD·Filed 1991·Granted Apr 28, 1992·17 cites·38 claims
- 1259US2025209899A1Monitoring system, monitoring method, and recording mediumNEC CORP·Filed 2025·Application pending·0 cites
- 1356US8320154B2Switching element and application of the sameHASEGAWA TSUYOSHI·Filed 2008·Granted Nov 27, 2012·1 cites·10 claims
- 1454US12283169B2Monitoring system, monitoring method, and recording mediumNEC CORP·Filed 2021·Granted Apr 22, 2025·0 cites·12 claims
- 1553US5572379AMagnetic recording drive having arrangements for average useful life of magnetorestive effects sensorsHITACHI LTD·Filed 1994·Granted Nov 5, 1996·6 cites·8 claims
- 1652US7181570B2Diskarray system for suppressing disk faultHITACHI LTD·Filed 2004·Granted Feb 20, 2007·2 cites·9 claims
- 1752US2024153606A1Information providing apparatus, information processing method, and recording mediumNEC CORP·Filed 2021·Application pending·0 cites
- 1849US7865665B2Storage system for checking data coincidence between a cache memory and a disk driveHITACHI LTD·Filed 2004·Granted Jan 4, 2011·0 cites·11 claims
- 1948US8291162B2Storage systemKITAMURA MANABU·Filed 2011·Granted Oct 16, 2012·0 cites·14 claims
- 2046US5241435AServo information recording method for a storage apparatusHITACHI LTD·Filed 1990·Granted Aug 31, 1993·7 cites·12 claims
- 2143US2002093760A1Magnetic disk drive and magnetic disk drive systemHITACHI LTD·Filed 2002·Application pending·0 cites
- 2243US2002093758A1Magnetic disk drive and magnetic disk drive systemHITACHI LTD·Filed 2002·Application pending·0 cites
- 2343US2002093759A1Magnetic disk drive and magnetic disk drive systemHITACHI LTD·Filed 2002·Application pending·0 cites
- 2437US2003151878A1Electronic apparatusFiled 2003·Application pending·0 cites
- 2531US6069762AMagnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensorsHITACHI LTD·Filed 1999·Granted May 30, 2000·0 cites·10 claims
- 2631US6014275AMagnetic recording driveHITACHI LTD·Filed 1996·Granted Jan 11, 2000·0 cites·6 claims
- 2731US5148334APhase synchronization circuitHITACHI LTD·Filed 1989·Granted Sep 15, 1992·2 cites·4 claims
Join the waitlist — get patent alerts
Get an alert when Takuji Ogawa files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →