P

Inventor

KATO YOSHIKI

JP70 patents
⚠️ This page may combine multiple inventors who share the name “KATO YOSHIKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HITACHI LTD

24 patents
US5815343ASep 29, 1998

Magnetic recording medium, process for producing the same and magnetic recording system

HITACHI LTD77 citations96
US5388020AFeb 7, 1995

Magnetic disk having improved surface configuration and magnetic disk unit including same

HITACHI LTD61 citations96
US5202810AApr 13, 1993

Magnetic disk having an improved surface configuration

HITACHI LTD76 citations96
US6057021AMay 2, 2000

Magnetic recording media and magnetic recording system using the same

HITACHI LTD42 citations95
US5750230AMay 12, 1998

Magnetic recording media and magnetic recording system using the same

HITACHI LTD44 citations95
US6303205B1Oct 16, 2001

Magnetic disk including protective layer having surface with protrusions, and substrate therefor

HITACHI LTD24 citations92
US5504646AApr 2, 1996

Magnetic disk including protective layer having surface with protusions and magnetic disk apparatus including the magnetic disk

HITACHI LTD29 citations92
US5364655ANov 15, 1994

Simultaneous double sides polishing method

HITACHI LTD48 citations92
US5353182AOct 4, 1994

Magnetic disk unit having magnetic disks and a magnetic head with a head slider which is in contact with surfaces of the magnetic disk

HITACHI LTD31 citations92
US5411630AMay 2, 1995

Magnetic disk manufacturing method

HITACHI LTD29 citations91
US4430387AFeb 7, 1984

Base plate for magnetic recording disc

HITACHI LTD46 citations90
US5285343AFeb 8, 1994

Magnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic disk

HITACHI LTD26 citations89
US4762534AAug 9, 1988

Method of producing magnetic disk

HITACHI LTD17 citations81
US5280401AJan 18, 1994

Magnetic recording medium, method for producing same and magnetic recording apparatus

HITACHI LTD11 citations74
US5930073AJul 27, 1999

Magnetic disk including protective layer having surface with magnetic disk including protrusions, and magnetic disk apparatus including the magnetic disk

HITACHI LTD9 citations73
US5690838ANov 25, 1997

Magnetic recording medium and process for producing same

HITACHI LTD8 citations73
US5680285AOct 21, 1997

Magnetic disk having improved surface configuration and magnetic disk unit including same

HITACHI LTD10 citations73
US5549211AAug 27, 1996

Method of producing magnetic disk

HITACHI LTD5 citations73
US5123933AJun 23, 1992

Method of producing magnetic disk

HITACHI LTD4 citations73
US5028242AJul 2, 1991

Lapping member and lapping tape

HITACHI LTD9 citations73
US4842618AJun 27, 1989

Method of producing magnetic disk

HITACHI LTD10 citations73
US5656349AAug 12, 1997

Magnetic disk, method of manufacturing the same and magnetic disk apparatus including the magnetic disk

HITACHI LTD12 citations72
US4238341ADec 9, 1980

Composition of magnetic recording media

HITACHI LTD15 citations72
US4229312AOct 21, 1980

Method of manufacturing a paint composite for magnetic films

HITACHI LTD8 citations72

DENSO CORP

19 patents

MITSUBISHI HEAVY IND LTD

5 patents

SONY CORP

1 patent

ASAHI INTECC CO LTD

1 patent

Showing the top 50 of 70 patents by PatentIndex Score.