Inventor
FUJIOKA KAZUO
JP17 patents
Patents
17 patentsUS5336421AAug 9, 1994
Spinel-type spherical, black iron oxide particles and process for the producing the same
TODA KOGYO CORP58 citations95
US5874019AFeb 23, 1999
Magnetic particles for magnetic toner and process for producing the same
TODA KOGYO CORP23 citations92
US5843610ADec 1, 1998
Magnetic particles for magentic toner and process for producing the same
TODA KOGYO CORP17 citations92
US5688852ANov 18, 1997
Iron oxide particles and process for producing the same
TODA KOGYO CORP24 citations92
US5652060AJul 29, 1997
Spherical magnetic particles for magnetic toner and process for producing the same
TODA KOGYO CORP27 citations92
US5648170AJul 15, 1997
Coated granular magnetite particles and process for producing the same
TODA KOGYO CORP20 citations92
US5599627AFeb 4, 1997
Magnetic particles comprising magnetite core and process for producing the same
TODA KOGYO CORP40 citations92
US5389482AFeb 14, 1995
Magnetic particle powder included in magnetic toners for magnetic image character recognition
TODA KOGYO CORP34 citations92
US5108862AApr 28, 1992
Composite carrier particles for electrophotography and process for producing the same
TODA KOGYO CORP24 citations91
US5512405AApr 30, 1996
Iron oxide particles and process for producing the same
TODA KOGYO CORP15 citations82
US5470660ANov 28, 1995
Iron oxide particles and process for producing the same
TODA KOGYO CORP17 citations82
US5328793AJul 12, 1994
Magnetic particles for magnetic toner
TODA KOGYO CORP8 citations73
US5118587AJun 2, 1992
Magnetic particles used for electrostatic latent image developer and process for producing the same
TODA KOGYO CORP9 citations73
US6103437AAug 15, 2000
Magnetic toner particles comprising magnetite particles containing silicon
TODA KOGYO CORP10 citations72
US5858532AJan 12, 1999
Magnetite particles, magnetic iron oxide particles, process for the production of the same and magnetic toner using the same
TODA KOGYO CORP12 citations72
US5578375ANov 26, 1996
Granular magnetite particles and process for producing the same
TODA KOGYO CORP5 citations62
US5232805AAug 3, 1993
Magnetic particles containing iron as the main component and process for producing the same
TODA KOGYO CORP6 citations59