Inventor
ISOBE RYOSUKE
JP24 patents
⚠️ This page may combine multiple inventors who share the name “ISOBE RYOSUKE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KONISHIROKU PHOTO IND
18 patentsUS5242752ASep 7, 1993
Magnetic recording medium comprising a specified binder resin, specified ferromagnetic metal powder and α-alumina
KONISHIROKU PHOTO IND113 citations97
US5324571AJun 28, 1994
Magnetic recording medium comprising a support and a plurality of layers in which the magnetic layer has a specified plastic deformation
KONISHIROKU PHOTO IND21 citations92
US4818606AApr 4, 1989
Highly running-endurant magnetic recording medium
KONISHIROKU PHOTO IND38 citations90
US5458948AOct 17, 1995
Magnetic recording medium
KONISHIROKU PHOTO IND19 citations82
US4713293ADec 15, 1987
Magnetic recording media
KONISHIROKU PHOTO IND19 citations81
US5340635AAug 23, 1994
Magnetic recording medium having a magnetic layer with a specified vickers indentation hardness or plastic deformation
KONISHIROKU PHOTO IND11 citations74
US5527603AJun 18, 1996
Magnetic recording medium
KONISHIROKU PHOTO IND11 citations73
US5496622AMar 5, 1996
Magnetic recording medium comprising an underlayer containing α-iron oxide powder and a magnetic layer containing ferromagnetic metallic powder
KONISHIROKU PHOTO IND17 citations73
US5455104AOct 3, 1995
Magnetic recording medium
KONISHIROKU PHOTO IND18 citations73
US5405679AApr 11, 1995
Magnetic recording medium comprising a non magnetic underlayer and two magnetic layers of specified composition and thickness
KONISHIROKU PHOTO IND10 citations73
US5153079AOct 6, 1992
Magnetic recording medium comprising ferromagnetic powder and polar group containing ginder resins having different glass transition temperatures
KONISHIROKU PHOTO IND9 citations73
US5094916AMar 10, 1992
Magnetic recording medium comprising a polyurethane binder resin having a specified glass transition, molecular weight, and polar group content
KONISHIROKU PHOTO IND8 citations73
US5670245ASep 23, 1997
Magnetic recording medium comprising a magnetic layer containing ferromagnetic metallic powder, binder, and aliphatic acid
KONISHIROKU PHOTO IND5 citations62
US5449527ASep 12, 1995
Method of producing magnetic recording medium
KONISHIROKU PHOTO IND3 citations62
US5061516AOct 29, 1991
Production method for magnetic recording medium
KONISHIROKU PHOTO IND3 citations62
US5045390ASep 3, 1991
Magnetic recording medium
KONISHIROKU PHOTO IND2 citations62
US4835049AMay 30, 1989
Magnetic recording medium
KONISHIROKU PHOTO IND3 citations58
US5084342AJan 28, 1992
Magnetic recording medium
KONISHIROKU PHOTO IND1 citations51