Inventor · disambiguated record
Hiroshi Itagaki
Also filed as: ITAGAKI HIROSHI
138 granted patents·6 pending applications·715 citations·filing 1988–2023
99Inventor score
Top patents by PatentIndex Score
144 records- 0196US11681437B2Dynamic tape storage device data bufferIBM·Filed 2021·Granted Jun 20, 2023·4 cites·17 claims
- 0296US10242709B1Detecting damaged areas on magnetic tape based on measuring a number of servo errorsIBM·Filed 2017·Granted Mar 26, 2019·16 cites·25 claims
- 0396US9600493B1Copy from source medium to target mediumIBM·Filed 2015·Granted Mar 21, 2017·15 cites·18 claims
- 0496US7350021B2Method of controlling write and read of data for tape recording apparatusIBM·Filed 2006·Granted Mar 25, 2008·35 cites·11 claims
- 0595US11289115B1Copying a storage tapeIBM·Filed 2021·Granted Mar 29, 2022·4 cites·20 claims
- 0695US7710681B2Optimizing tape speed for a sync operationIBM·Filed 2007·Granted May 4, 2010·22 cites·30 claims
- 0793US10453485B1Increasing data storage capacity by reducing index entriesIBM·Filed 2018·Granted Oct 22, 2019·14 cites·20 claims
- 0892US11914883B2Copy from LTFS to diskIBM·Filed 2022·Granted Feb 27, 2024·2 cites·20 claims
- 0992US11662954B1Duplicating tape media within a tape storage system based on copy tape databaseIBM·Filed 2022·Granted May 30, 2023·2 cites·20 claims
- 1092US7903363B2Same Wrap backhitchless write method to encode data on a tape storage mediumIBM·Filed 2008·Granted Mar 8, 2011·19 cites·22 claims
- 1191US6357030B1ECC block format for storage deviceIBM·Filed 1998·Granted Mar 12, 2002·91 cites·12 claims
- 1290US9830085B1Recalling files stored on a tapeIBM·Filed 2017·Granted Nov 28, 2017·5 cites·1 claims
- 1387US11010104B2Optimized tape drive unmountingIBM·Filed 2019·Granted May 18, 2021·4 cites·20 claims
- 1487US9459814B1Data writing in a file systemIBM·Filed 2016·Granted Oct 4, 2016·6 cites·1 claims
- 1587US6950257B1Writing to magnetic tape with backhitchless backspacing and data set invalidationIBM·Filed 2004·Granted Sep 27, 2005·24 cites·39 claims
- 1687US5837757AFlame-retardant polycarbonate compositionsIDEMITSU PETROCHEMICAL CO·Filed 1997·Granted Nov 17, 1998·68 cites·17 claims
- 1786US10152993B1Save block data to tape in a reverse orderIBM·Filed 2017·Granted Dec 11, 2018·4 cites·3 claims
- 1886US9772775B2Scalable and efficient access to and management of data and resources in a tiered data storage systemIBM·Filed 2015·Granted Sep 26, 2017·5 cites·20 claims
- 1986US8477440B2Tape recorder and tape recording that increases empty tape area without loss of necessary dataITAGAKI HIROSHI·Filed 2010·Granted Jul 2, 2013·9 cites·7 claims
- 2086US7821728B2Detection of defective tape drive by aggregating read error statisticsIBM·Filed 2008·Granted Oct 26, 2010·6 cites·20 claims
- 2185US10497394B2Detecting damaged areas on magnetic tape based on measuring number of servo errorsIBM·Filed 2019·Granted Dec 3, 2019·4 cites·25 claims
- 2285US7385776B2Device, method, and program product for controlling a tape data storage driveIBM·Filed 2006·Granted Jun 10, 2008·5 cites·5 claims
- 2384US11176964B1Optimized tape unmount operationIBM·Filed 2020·Granted Nov 16, 2021·2 cites·20 claims
- 2484US10545698B2Copy from source medium to target mediumIBM·Filed 2017·Granted Jan 28, 2020·3 cites·20 claims
- 2583US10649697B2Technique for providing information on time to read a fileIBM·Filed 2015·Granted May 12, 2020·4 cites·20 claims
- 2683US10229718B1Shortening the average reposition time to the beginning of files in a magnetic tapeIBM·Filed 2018·Granted Mar 12, 2019·4 cites·20 claims
- 2783US10168920B2Duplexing file system dataIBM·Filed 2015·Granted Jan 1, 2019·4 cites·18 claims
- 2883US10162527B2Scalable and efficient access to and management of data and resources in a tiered data storage systemIBM·Filed 2017·Granted Dec 25, 2018·3 cites·18 claims
- 2983US6423766B1Flame-retardant polycarbonate resin composition and electrical and electronic components made by molding the sameIDEMITSU PETROCHEMICAL CO·Filed 1998·Granted Jul 23, 2002·44 cites·8 claims
- 3082US10073631B2Recalling files stored on a tapeIBM·Filed 2017·Granted Sep 11, 2018·2 cites·1 claims
- 3182US10073632B2Recalling files stored on a tapeIBM·Filed 2017·Granted Sep 11, 2018·2 cites·1 claims
- 3282US9383945B2Method of writing a file to a plurality of media and a storage system thereofIBM·Filed 2013·Granted Jul 5, 2016·4 cites·18 claims
- 3381US10734021B1High speed file copy from tape using block groupingIBM·Filed 2019·Granted Aug 4, 2020·4 cites·25 claims
- 3481US9830102B2Method of writing a file to a plurality of media and a storage system thereofIBM·Filed 2016·Granted Nov 28, 2017·4 cites·15 claims
- 3581US6865043B2Data set information for recovery of synchronized data on magnetic tapeIBM·Filed 2002·Granted Mar 8, 2005·27 cites·21 claims
- 3679US11163500B2Caching files in a directoryIBM·Filed 2019·Granted Nov 2, 2021·2 cites·19 claims
- 3779US9036286B2Reading data stored in recording mediumFUJIHARA SHINOBU·Filed 2009·Granted May 19, 2015·4 cites·9 claims
- 3879US5121230AImage reading apparatus having adjusting circuits for matching the level of and compensating for fluctuation among a plurality of sensing elementsCANON KK·Filed 1988·Granted Jun 9, 1992·28 cites·71 claims
- 3978US11204891B2Identifying partial update for tape file systemIBM·Filed 2016·Granted Dec 21, 2021·2 cites·14 claims
- 4078US8400897B2Migrating data from one recording medium to anotherITAGAKI HIROSHI·Filed 2011·Granted Mar 19, 2013·5 cites·20 claims
- 4177US12105980B2Appending data to a tape cartridge during recall operationsIBM·Filed 2023·Granted Oct 1, 2024·0 cites·25 claims
- 4277US11132332B2Method to write data ahead to snapshot area to avoid copy-on-writeIBM·Filed 2018·Granted Sep 28, 2021·2 cites·20 claims
- 4377US10331348B2Reading and writing via file system for tape recording systemIBM·Filed 2015·Granted Jun 25, 2019·2 cites·19 claims
- 4477US9262081B2Method for reading file using plurality of tape mediaIBM·Filed 2015·Granted Feb 16, 2016·2 cites·20 claims
- 4576US10120612B2Apparatus, method, and program product for tape copyingIBM·Filed 2017·Granted Nov 6, 2018·2 cites·17 claims
- 4676US10067700B2Storing meta-information on tape recording systemsIBM·Filed 2015·Granted Sep 4, 2018·2 cites·18 claims
- 4776US9292227B2Method for divisionally managing files on a user basis, and a storage system and computer program product thereofIBM·Filed 2013·Granted Mar 22, 2016·3 cites·20 claims
- 4875US12032825B2Dynamic tape storage device data bufferIBM·Filed 2023·Granted Jul 9, 2024·0 cites·18 claims
- 4974US11152018B1Optimized tape unmount operationIBM·Filed 2020·Granted Oct 19, 2021·1 cites·20 claims
- 5074US10902872B1Managing index writes to a tape mediumIBM·Filed 2019·Granted Jan 26, 2021·1 cites·20 claims
Showing the top 50 of 144 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →