P

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 patents
US6163436ADec 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 patents

SHOWA DENKO MATERIALS CO LTD

7 patents

HITACHI CHEMICAL CO LTD

4 patents

MITSUBISHI PHARMA CORP

1 patent

RESONAC CORP

1 patent

Showing the top 50 of 56 patents by PatentIndex Score.