Inventor · disambiguated record
Kazumasa Fukuda
Also filed as: FUKUDA KAZUMASA
55 granted patents·5 pending applications·611 citations·filing 1976–2024
98Inventor score
Files withTDK CORP31SHOWA DENKO MATERIALS CO LTD9TDK ELECTRONICS CO LTD9HITACHI CHEMICAL CO LTD8RESONAC CORP3
Top patents by PatentIndex Score
60 records- 0196US7443633B2Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic headTDK CORP·Filed 2005·Granted Oct 28, 2008·45 cites·42 claims
- 0291US11015020B2Epoxy resin, epoxy resin composition, epoxy resin cured product and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2016·Granted May 25, 2021·3 cites·8 claims
- 0391US10920010B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2017·Granted Feb 16, 2021·3 cites·9 claims
- 0491US10597485B2Production methods for glassy liquid-crystalline epoxy resin and glassy liquid-crystalline epoxy resin composition, storage methods for liquid-crystalline epoxy resin and liquid-crystalline epoxy resin composition, glassy liquid-crystalline epoxy resin and glassy liquid-crystalline epoxy resin composition, liquid-crystalline epoxy resin and liquid-crystalline epoxy resin composition, and production method for cured epoxy resinHITACHI CHEMICAL CO LTD·Filed 2017·Granted Mar 24, 2020·5 cites·15 claims
- 0591US6487041B2Thin film magnetic head with interlayers of multi-layer poles widening to a constant width portion at a receded distanceTDK CORP·Filed 2001·Granted Nov 26, 2002·30 cites·4 claims
- 0690US6163436AThin film magnet head with improved performanceTDK CORP·Filed 1998·Granted Dec 19, 2000·65 cites·11 claims
- 0788US11466119B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2018·Granted Oct 11, 2022·2 cites·14 claims
- 0888US10800872B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialHITACHI CHEMICAL CO LTD·Filed 2017·Granted Oct 13, 2020·2 cites·10 claims
- 0988US2024417509A1Epoxy resin, epoxy resin composition, epoxy resin cured product and method of producing epoxy resin cured product, composite material, insulating member, electronic appliance, structural material, and vehicleRESONAC CORP·Filed 2024·Application pending·0 cites
- 1087US12104009B2Epoxy resin, epoxy resin composition, epoxy resin cured product and method of producing epoxy resin cured product, composite material, insulating member, electronic appliance, structural material, and vehicleRESONAC CORP·Filed 2018·Granted Oct 1, 2024·1 cites·7 claims
- 1187US11440990B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2017·Granted Sep 13, 2022·2 cites·13 claims
- 1284US4599266AMagnetic recording mediumTDK CORP·Filed 1985·Granted Jul 8, 1986·28 cites·13 claims
- 1383US4393110AMagnetic recording mediumTDK ELECTRONICS CO LTD·Filed 1982·Granted Jul 12, 1983·24 cites·2 claims
- 1482US12116451B2Epoxy resin, epoxy resin composition, epoxy resin cured product and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2019·Granted Oct 15, 2024·1 cites·11 claims
- 1582US6130805AThin film magnetic head having upper pole chip formed over insulating layerTDK CORP·Filed 1998·Granted Oct 10, 2000·37 cites·22 claims
- 1680US4908727ADisk with substrate of alumina silicate resin glassTDK CORP·Filed 1988·Granted Mar 13, 1990·20 cites·4 claims
- 1779US4642270AMagnetic recording mediumTDK CORP·Filed 1984·Granted Feb 10, 1987·29 cites·5 claims
- 1878US6252748B1Thin film magnetic head with widening outer layer of multi-layer poleTDK CORP·Filed 1998·Granted Jun 26, 2001·27 cites·5 claims
- 1977US5530609AMagnetic recording/reproducing method using a thin film magneticTDK CORP·Filed 1994·Granted Jun 25, 1996·26 cites·9 claims
- 2075US4803577AVertical magnetic recording system using rigid diskTDK CORP·Filed 1986·Granted Feb 7, 1989·17 cites·3 claims
- 2172US5126901AThin film magnetic head having a narrow upper surfaceTDK CORP·Filed 1990·Granted Jun 30, 1992·22 cites·2 claims
- 2271US4918556AMagnetic disk recording and reproducing apparatusTDK CORP·Filed 1988·Granted Apr 17, 1990·16 cites·14 claims
- 2371US4636448AMagnetic recording mediumTDK CORP·Filed 1985·Granted Jan 13, 1987·25 cites·6 claims
- 2469US6810578B1Method of manufacturing thin film magnetic head with improved performanceTDK CORP·Filed 2000·Granted Nov 2, 2004·6 cites·6 claims
- 2569US4939604AMagnetic recording and reproducing apparatus and a magnetic head used for the apparatusTDK CORP·Filed 1989·Granted Jul 3, 1990·15 cites·17 claims
- 2666US12049538B2Epoxy resin, epoxy resin composition, epoxy resin cured product and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2018·Granted Jul 30, 2024·0 cites·12 claims
- 2764US5844749AThin film magnetic head with an induction type magnetic transducer for suppressing sub-pulsesTDK CORP·Filed 1996·Granted Dec 1, 1998·15 cites·10 claims
- 2863US5416656AMagnetic recording and reproducing head having a flat surface with round front ridgeTDK CORP·Filed 1991·Granted May 16, 1995·15 cites·4 claims
- 2962US5812349AMagnetic head apparatus including separation featuresTDK CORP·Filed 1997·Granted Sep 22, 1998·25 cites·5 claims
- 3059US11661475B2Epoxy resin, epoxy resin composition, epoxy resin cured product and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2019·Granted May 30, 2023·0 cites·9 claims
- 3159US11352562B2Epoxy resin, epoxy resin composition, epoxy resin cured product and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2019·Granted Jun 7, 2022·0 cites·7 claims
- 3258US11149109B2Epoxy resin composition, cured product and composite materialHITACHI CHEMICAL CO LTD·Filed 2017·Granted Oct 19, 2021·0 cites·9 claims
- 3358US9745411B2Resin composition, resin sheet, cured resin sheet, resin sheet structure, cured resin sheet structure, method for producing cured resin sheet structure, semiconductor device, and LED deviceHITACHI CHEMICAL CO LTD·Filed 2014·Granted Aug 29, 2017·1 cites·16 claims
- 3458US5094896AMagnetic recording medium comprising a glass substrate having a magnetic thin film of γ Fe2 O3 which layer has a resistivity of from 0.03 to 3 Ω-cmTDK CORP·Filed 1990·Granted Mar 10, 1992·11 cites·11 claims
- 3557US6609291B1Method of manufacturing a thin film magnetic headTDK CORP·Filed 2000·Granted Aug 26, 2003·2 cites·12 claims
- 3657US4113528AMethod of preventing deterioration of characteristics of ferromagnetic metal or alloy particlesTDK ELECTRONICS CO LTD·Filed 1976·Granted Sep 12, 1978·8 cites·4 claims
- 3755US11919995B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialRESONAC CORP·Filed 2019·Granted Mar 5, 2024·0 cites·14 claims
- 3854US6144533AThin film magnetic headTDK CORP·Filed 1998·Granted Nov 7, 2000·11 cites·4 claims
- 3953US5094897AMagnetic recording medium comprising a glass substrate and a gamma Fe2 3 magnetic thin film with specified X-ray diffraction and surface roughnessTDK CORP·Filed 1990·Granted Mar 10, 1992·15 cites·9 claims
- 4052US11840600B2Cured epoxy resin material, epoxy resin composition, molded article, and composite materialHITACHI CHEMICAL CO LTD·Filed 2017·Granted Dec 12, 2023·0 cites·7 claims
- 4152US11560476B2Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialSHOWA DENKO MATERIALS CO LTD·Filed 2017·Granted Jan 24, 2023·0 cites·6 claims
- 4251US5991110AThin film magnetic head and magnetic recording and reproducing apparatusTDK CORP·Filed 1998·Granted Nov 23, 1999·8 cites·20 claims
- 4347US4454195AMagnetic recording mediumTDK ELECTRONICS CO LTD·Filed 1982·Granted Jun 12, 1984·9 cites·8 claims
- 4446US7061718B2Thin film magnetic head having thin film coil embedded in first insulating layer covered with second insulating layerTDK CORP·Filed 2003·Granted Jun 13, 2006·0 cites·4 claims
- 4546US5847899AMagnetic disk recording and reproducing apparatusTDK CORP·Filed 1997·Granted Dec 8, 1998·7 cites·28 claims
- 4646US2020262969A1Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite materialHITACHI CHEMICAL CO LTD·Filed 2017·Application pending·0 cites
- 4744US7916434B2Tunnel magnetoresistive effect element with limited electric popping output voltageTDK CORP·Filed 2006·Granted Mar 29, 2011·0 cites·7 claims
- 4844US5072320AMagnetic recording and reproducing apparatus having improved durabilityTDK CORP·Filed 1989·Granted Dec 10, 1991·5 cites·9 claims
- 4942US7120990B2Method for manufacturing thin film magnetic head with improved performanceTDK CORP·Filed 2004·Granted Oct 17, 2006·0 cites·5 claims
- 5042US2019225794A1Gas barrier material, resin composition, gas barrier member, cured product, and composite materialHITACHI CHEMICAL CO LTD·Filed 2017·Application pending·0 cites
Showing the top 50 of 60 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →