Inventor
FUKUDA KAZUMASA
JP56 patents
⚠️ This page may combine multiple inventors who share the name “FUKUDA KAZUMASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
TDK CORP
28 patentsUS6163436ADec 19, 2000
Thin film magnet head with improved performance
TDK CORP65 citations96
US6130805AOct 10, 2000
Thin film magnetic head having upper pole chip formed over insulating layer
TDK CORP37 citations93
US4642270AFeb 10, 1987
Magnetic recording medium
TDK CORP29 citations93
US4636448AJan 13, 1987
Magnetic recording medium
TDK CORP25 citations93
US7443633B2Oct 28, 2008
Thin-film magnetic head for perpendicular magnetic recording and manufacturing method of thin-film magnetic head
TDK CORP45 citations92
US6487041B2Nov 26, 2002
Thin film magnetic head with interlayers of multi-layer poles widening to a constant width portion at a receded distance
TDK CORP30 citations92
US6252748B1Jun 26, 2001
Thin film magnetic head with widening outer layer of multi-layer pole
TDK CORP27 citations92
US5530609AJun 25, 1996
Magnetic recording/reproducing method using a thin film magnetic
TDK CORP26 citations92
US5126901AJun 30, 1992
Thin film magnetic head having a narrow upper surface
TDK CORP22 citations92
US4599266AJul 8, 1986
Magnetic recording medium
TDK CORP28 citations92
US5812349ASep 22, 1998
Magnetic head apparatus including separation features
TDK CORP25 citations91
US4908727AMar 13, 1990
Disk with substrate of alumina silicate resin glass
TDK CORP20 citations82
US4803577AFeb 7, 1989
Vertical magnetic recording system using rigid disk
TDK CORP17 citations82
US6810578B1Nov 2, 2004
Method of manufacturing thin film magnetic head with improved performance
TDK CORP6 citations74
US6144533ANov 7, 2000
Thin film magnetic head
TDK CORP11 citations74
US5991110ANov 23, 1999
Thin film magnetic head and magnetic recording and reproducing apparatus
TDK CORP8 citations74
US5847899ADec 8, 1998
Magnetic disk recording and reproducing apparatus
TDK CORP7 citations74
US5844749ADec 1, 1998
Thin film magnetic head with an induction type magnetic transducer for suppressing sub-pulses
TDK CORP15 citations74
US4939604AJul 3, 1990
Magnetic recording and reproducing apparatus and a magnetic head used for the apparatus
TDK CORP15 citations74
US4918556AApr 17, 1990
Magnetic disk recording and reproducing apparatus
TDK CORP16 citations74
US5416656AMay 16, 1995
Magnetic recording and reproducing head having a flat surface with round front ridge
TDK CORP15 citations73
US5094897AMar 10, 1992
Magnetic recording medium comprising a glass substrate and a gamma Fe2 3 magnetic thin film with specified X-ray diffraction and surface roughness
TDK CORP15 citations73
US5094896AMar 10, 1992
Magnetic 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-cm
TDK CORP11 citations73
US6609291B1Aug 26, 2003
Method of manufacturing a thin film magnetic head
TDK CORP2 citations63
US5268799ADec 7, 1993
Magnetic recording and reproducing apparatus
TDK CORP2 citations63
US5072320ADec 10, 1991
Magnetic recording and reproducing apparatus having improved durability
TDK CORP5 citations63
US7120990B2Oct 17, 2006
Method for manufacturing thin film magnetic head with improved performance
TDK CORP0 citations52
US7061718B2Jun 13, 2006
Thin film magnetic head having thin film coil embedded in first insulating layer covered with second insulating layer
TDK CORP0 citations52
TDK ELECTRONICS CO LTD
9 patentsUS4393110AJul 12, 1983
Magnetic recording medium
TDK ELECTRONICS CO LTD24 citations82
US4113528ASep 12, 1978
Method of preventing deterioration of characteristics of ferromagnetic metal or alloy particles
TDK ELECTRONICS CO LTD8 citations74
US4454195AJun 12, 1984
Magnetic recording medium
TDK ELECTRONICS CO LTD9 citations72
US4268882AMay 19, 1981
Magnetic erasing head
TDK ELECTRONICS CO LTD3 citations63
US4097313AMay 27, 1978
Method of recovery of ferromagnetic metal or alloy particles by using a magnetic drum
TDK ELECTRONICS CO LTD6 citations63
US4563396AJan 7, 1986
Magnetic recording medium
TDK ELECTRONICS CO LTD5 citations62
US4588654AMay 13, 1986
Magnetic recording medium
TDK ELECTRONICS CO LTD5 citations61
US4533603AAug 6, 1985
Magnetic recording medium
TDK ELECTRONICS CO LTD3 citations61
US4452864AJun 5, 1984
Magnetic recording medium
TDK ELECTRONICS CO LTD4 citations61
SHOWA DENKO MATERIALS CO LTD
7 patentsUS11466119B2Oct 11, 2022
Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite material
SHOWA DENKO MATERIALS CO LTD2 citations73
US11015020B2May 25, 2021
Epoxy resin, epoxy resin composition, epoxy resin cured product and composite material
SHOWA DENKO MATERIALS CO LTD3 citations73
US10920010B2Feb 16, 2021
Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite material
SHOWA DENKO MATERIALS CO LTD3 citations73
US11440990B2Sep 13, 2022
Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite material
SHOWA DENKO MATERIALS CO LTD2 citations71
US12049538B2Jul 30, 2024
Epoxy resin, epoxy resin composition, epoxy resin cured product and composite material
SHOWA DENKO MATERIALS CO LTD0 citations62
US11661475B2May 30, 2023
Epoxy resin, epoxy resin composition, epoxy resin cured product and composite material
SHOWA DENKO MATERIALS CO LTD0 citations62
US12116451B2Oct 15, 2024
Epoxy resin, epoxy resin composition, epoxy resin cured product and composite material
SHOWA DENKO MATERIALS CO LTD1 citations60
HITACHI CHEMICAL CO LTD
4 patentsUS10800872B2Oct 13, 2020
Epoxy resin, epoxy resin composition, epoxy resin cured product, and composite material
HITACHI CHEMICAL CO LTD2 citations73
US10597485B2Mar 24, 2020
Production 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 resin
HITACHI CHEMICAL CO LTD5 citations72
US11149109B2Oct 19, 2021
Epoxy resin composition, cured product and composite material
HITACHI CHEMICAL CO LTD0 citations62
US11840600B2Dec 12, 2023
Cured epoxy resin material, epoxy resin composition, molded article, and composite material
HITACHI CHEMICAL CO LTD0 citations52
MITSUBISHI PHARMA CORP
1 patentRESONAC CORP
1 patentShowing the top 50 of 56 patents by PatentIndex Score.