Inventor
ISOAI MASARU
JP9 patents
Patents
9 patentsUS5587232ADec 24, 1996
Non-magnetic particles for non-magnetic undercoating layer of magnetic recording medium, non-magnetic undercoating layer containing the same, and magnetic recording medium having the undercoating layer
TODA KOGYO CORP25 citations91
US5314750AMay 24, 1994
Magnetic iron oxide particles and method of producing same
TODA KOGYO CORP20 citations91
US5993536ANov 30, 1999
Method of decoloring colored concrete
TODA KOGYO CORP7 citations73
US4873010AOct 10, 1989
Spindle-like magnetic iron oxide particles and process for producing the same
TODA KOGYO CORP15 citations71
US6476112B2Nov 5, 2002
Calcium-iron oxide composite particles
TODA KOGYO CORP3 citations62
US6228924B1May 8, 2001
Calcium-iron oxide composite particles and resin molded product containing the same
TODA KOGYO CORP2 citations62
US5582914ADec 10, 1996
Magnetic iron oxide particles and method of producing the same
TODA KOGYO CORP2 citations61
US5480571AJan 2, 1996
Process for producing acicular goethite particles and acicular magnetic iron oxide particles
TODA KOGYO CORP3 citations60
US5378380AJan 3, 1995
Process for producing acicular geothite particles and acicular magnetic iron oxide particles
TODA KOGYO CORP2 citations60