Inventor · disambiguated record
Iwao Okamoto
Also filed as: OKAMOTO IWAO
44 granted patents·8 pending applications·740 citations·filing 1988–2015
98Inventor score
Top patents by PatentIndex Score
52 records- 0195US6602612B2Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2001·Granted Aug 5, 2003·71 cites·13 claims
- 0293US8559131B2Perpendicular magnetic recording media and magnetic disc apparatusMASUDA DAISUKE·Filed 2011·Granted Oct 15, 2013·69 cites·8 claims
- 0393US6689495B1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Feb 10, 2004·45 cites·13 claims
- 0492US6562489B2Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2001·Granted May 13, 2003·32 cites·24 claims
- 0591US7625643B2Magnetic recording medium, magnetic storage apparatus and recording methodFUJITSU LTD·Filed 2007·Granted Dec 1, 2009·13 cites·25 claims
- 0691US6645646B1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Nov 11, 2003·36 cites·26 claims
- 0790US6821652B1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Nov 23, 2004·32 cites·8 claims
- 0888US7271984B2Magnetic recording medium having at least two coupled magnetic layers, magnetic storage apparatus and recording methodFUJITSU LTD·Filed 2004·Granted Sep 18, 2007·24 cites·19 claims
- 0985US7927725B2Magnetic recording medium, production method thereof and magnetic disc apparatusSHOWA DENKO KK·Filed 2008·Granted Apr 19, 2011·7 cites·13 claims
- 1084US6551728B1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Apr 22, 2003·19 cites·17 claims
- 1183US6828047B2Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2003·Granted Dec 7, 2004·14 cites·13 claims
- 1280US6753101B1Magnetic recording medium, magnetic storage apparatus, recording method and method of producing magnetic recording mediumFUJITSU LTD·Filed 2000·Granted Jun 22, 2004·23 cites·33 claims
- 1379US5523639AElectrostatic actuator having ferroelectrics in which residual dielectric polarization is formedFUJITSU LTD·Filed 1994·Granted Jun 4, 1996·35 cites·16 claims
- 1478US6881496B2Antiferromagnetically coupled magnetic recording medium possessing three coupled magnetic layers and magnetic storage apparatusFUJITSU LTD·Filed 2002·Granted Apr 19, 2005·21 cites·12 claims
- 1577US5843569AMagnetic recording medium and deviceFUJITSU LTD·Filed 1997·Granted Dec 1, 1998·37 cites·8 claims
- 1676US8922936B2Apparatus of single write magnetic discOKAMOTO IWAO·Filed 2011·Granted Dec 30, 2014·5 cites·6 claims
- 1776US6020060AMagnetic recording medium, process for producing the same and magnetic disk deviceFUJITSU LTD·Filed 1998·Granted Feb 1, 2000·28 cites·10 claims
- 1869US6534205B2Magnetic storage mediumFUJITSU LTD·Filed 1999·Granted Mar 18, 2003·22 cites·11 claims
- 1969US6147488AMeasurement method of time dependent magnetic remanence in a recording mediumFUJITSU LTD·Filed 1998·Granted Nov 14, 2000·21 cites·10 claims
- 2068US7079340B2Apparatus and method of measuring write magnetic field of recording headFUJITSU LTD·Filed 2004·Granted Jul 18, 2006·7 cites·14 claims
- 2167US9042053B1Thermally stabilized perpendicular magnetic recording mediumWD MEDIA LLC·Filed 2014·Granted May 26, 2015·1 cites·28 claims
- 2267US6071607AMagnetic recording medium and magnetic disk deviceFUJITSU LTD·Filed 1997·Granted Jun 6, 2000·20 cites·25 claims
- 2367US5774783AMagnetic recording mediumFUJITSU LTD·Filed 1996·Granted Jun 30, 1998·17 cites·4 claims
- 2466US6677051B1Magnetic recording medium with dual magnetic layers having specific composition requirements and a magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Jan 13, 2004·11 cites·11 claims
- 2563US7435489B2Magnetic recording medium, magnetic storage apparatus and recording methodFUJITSU LTD·Filed 2004·Granted Oct 14, 2008·5 cites·21 claims
- 2663US6689496B1Magnetic recording medium, method of producing magnetic recording medium, and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Feb 10, 2004·5 cites·20 claims
- 2757US6562481B1Magnetic storage mediumFUJITSU LTD·Filed 1999·Granted May 13, 2003·14 cites·15 claims
- 2857US6506508B1Magnetic recording medium, method of production and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Jan 14, 2003·13 cites·12 claims
- 2957US5900323AMagnetic recording medium and magnetic recording driveFUJITSU LTD·Filed 1995·Granted May 4, 1999·13 cites·15 claims
- 3056US9431045B1Magnetic seed layer used with an unbalanced soft underlayerWD MEDIA LLC·Filed 2015·Granted Aug 30, 2016·1 cites·19 claims
- 3156US6905781B2Magnetic recording medium with Cr<110> preferred growth along a predetermined direction, method of producing the same and magnetic storage apparatusFUJITSU LTD·Filed 2003·Granted Jun 14, 2005·2 cites·9 claims
- 3254US7115330B2Magnetic recording medium with CR <110> preferred growth along a predetermined direction, method of producing the same and magnetic storage apparatusFUJITSU LTD·Filed 2005·Granted Oct 3, 2006·0 cites·10 claims
- 3354US6613460B1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2000·Granted Sep 2, 2003·11 cites·7 claims
- 3454US6534204B1Magnetic storage mediumFUJITSU LTD·Filed 1999·Granted Mar 18, 2003·18 cites·18 claims
- 3552US9548073B1Systems and methods for providing high performance soft magnetic underlayers for magnetic recording mediaWD MEDIA LLC·Filed 2013·Granted Jan 17, 2017·0 cites·6 claims
- 3651USRE38587EMagnetic recording mediumFUJITSU LTD·Filed 2000·Granted Sep 14, 2004·1 cites·4 claims
- 3751US2008285177A1Magnetic recording medium, method for manufacturing the same, and magnetic recording apparatusFUJITSU LTD·Filed 2008·Application pending·0 cites
- 3849US6129981AMagnetic recording medium and magnetic recording disk deviceFUJITSU LTD·Filed 1998·Granted Oct 10, 2000·12 cites·26 claims
- 3949US5645898AMethod for manufacturing a magnetic recording memberFUJITSU LTD·Filed 1996·Granted Jul 8, 1997·8 cites·25 claims
- 4046US6740383B2Magnetic recording medium possessing a ratio of Hc(perpendicular) to Hc(horizontal) that is not more than 0.22 and magnetic recording disk deviceFUJITSU LTD·Filed 1999·Granted May 25, 2004·7 cites·9 claims
- 4146US6541104B2Magnetic recording medium and a magnetic recording deviceFUJITSU LTD·Filed 2001·Granted Apr 1, 2003·7 cites·8 claims
- 4245US5164349AElectromagnetic effect materialUBE INDUSTRIES·Filed 1991·Granted Nov 17, 1992·9 cites·12 claims
- 4344US2003124390A1Magnetic recording medium and magnetic storage apparatusFUJITSU LTD·Filed 2003·Application pending·0 cites
- 4442US2005136291A1Magnetic recording medium, recording method and magnetic storage apparatusFUJITSU LTD·Filed 2004·Application pending·0 cites
- 4540US2003124389A1Magnetic recording medium, method of producing magnetic recording medium and storage apparatusFUJITSU LTD·Filed 2003·Application pending·0 cites
- 4640US2012156523A1Perpendicular Magnetic Recording Medium And Method Of Manufacturing SameSEKI TOMOKO·Filed 2011·Application pending·0 cites
- 4737US2002001736A1Magnetic recording mediumFiled 2000·Application pending·0 cites
- 4836US9472227B2Perpendicular magnetic recording media and methods for producing the sameSHIN HI·Filed 2011·Granted Oct 18, 2016·0 cites·11 claims
- 4935US2001012573A1Magnetic recording medium, process for fabricating magnetic recording medium and information regeneratorFUJITSU LTD·Filed 2000·Application pending·0 cites
- 5032US5986836AMagnetic recording method and deviceFUJITSU LTD·Filed 1997·Granted Nov 16, 1999·1 cites·14 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Iwao Okamoto 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 →