Inventor

DOUSHITA HIROAKI

JP21 patents

Patents

21 patents

US6579592B1Jun 17, 2003

Magnetic recording tape with controlled Hc and magnetic flux/unit area value and controlled Cl/Fe intensity

FUJI PHOTO FILM CO LTD26 citations92

US5512350AApr 30, 1996

Magnetic recording medium having a magnetic layer with a specified surface roughness and which contains ferromagnetic powder, binder, and an abrasive

FUJI PHOTO FILM CO LTD36 citations92

US5479311ADec 26, 1995

Magnetic tape cassette having improved magnetic tape substrate and tape guide for reducing electrostatic charging

FUJI PHOTO FILM CO LTD20 citations92

US7129019B2Oct 31, 2006

Optical information recording medium

FUJI PHOTO FILM CO LTD17 citations83

US6291052B1Sep 18, 2001

Magnetic recording medium

FUJI PHOTO FILM CO LTD15 citations83

US6641891B2Nov 4, 2003

Magnetic recording medium

FUJI PHOTO FILM CO LTD11 citations74

US6316077B1Nov 13, 2001

Magnetic recording medium

FUJI PHOTO FILM CO LTD12 citations74

US5322733AJun 21, 1994

Magnetic recording medium

FUJI PHOTO FILM CO LTD7 citations74

US6805942B2Oct 19, 2004

Magnetic recording tape

FUJI PHOTO FILM CO LTD8 citations73

US5096774AMar 17, 1992

Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range

FUJI PHOTO FILM CO LTD9 citations73

US6645648B2Nov 11, 2003

Magnetic recording medium comprising a backcoat layer having specific protrusions

FUJI PHOTO FILM CO LTD9 citations72

US6818277B2Nov 16, 2004

Magnetic recording medium and reproduction process using the same

FUJI PHOTO FILM CO LTD5 citations63

US6703107B2Mar 9, 2004

Magnetic tape

FUJI PHOTO FILM CO LTD3 citations63

US7041398B2May 9, 2006

Magnetic recording medium and magnetic recording and reproducing method using the same

FUJI PHOTO FILM CO LTD5 citations62

US6767612B2Jul 27, 2004

Magnetic recording medium

FUJI PHOTO FILM CO LTD5 citations62

US6037051AMar 14, 2000

Magnetic tape

FUJI PHOTO FILM CO LTD3 citations62

US5503943AApr 2, 1996

Magnetic recording medium

FUJI PHOTO FILM CO LTD4 citations62

US5093191AMar 3, 1992

Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range

FUJI PHOTO FILM CO LTD4 citations62

US6936338B2Aug 30, 2005

Magnetic recording tape

FUJI PHOTO FILM CO LTD1 citations52

US6835445B2Dec 28, 2004

Magnetic recording medium

FUJI PHOTO FILM CO LTD0 citations51

US6713171B2Mar 30, 2004

Magnetic recording medium

FUJI PHOTO FILM CO LTD1 citations51