Inventor
SASAZAWA KOJI
16 patents
Patents
16 patentsUS4200680AApr 29, 1980
Process for preparing magnetic iron oxide and magnetic iron oxide produced thereby
FUJI PHOTO FILM CO LTD56 citations96
US4125474ANov 14, 1978
Process for producing ferrogmagnetic iron oxide powder comprising a pre-treatment with a reducing agent
FUJI PHOTO FILM CO LTD23 citations82
US4066564AJan 3, 1978
Process for producing cobalt- and iron-containing ferromagnetic powder by heat-treatment in the presence of an oxidizing agent
FUJI PHOTO FILM CO LTD20 citations82
US4015030AMar 29, 1977
Process for stabilization of ferromagnetic material and magnetic recording member
FUJI PHOTO FILM CO LTD21 citations82
US4002804AJan 11, 1977
Magnetic recording material
FUJI PHOTO FILM CO LTD28 citations81
US4267207AMay 12, 1981
Process for producing cobalt-containing ferromagnetic iron oxide powder
FUJI PHOTO FILM CO LTD22 citations79
US5370928ADec 6, 1994
Magnetic recording medium
FUJI PHOTO FILM CO LTD11 citations73
US4990361AFeb 5, 1991
Method for producing magnetic recording medium
FUJI PHOTO FILM CO LTD7 citations73
US4876113AOct 24, 1989
Method for producing magnetic recording media
FUJI PHOTO FILM CO LTD9 citations73
US4069164AJan 17, 1978
Process for producing ferromagnetic powder
FUJI PHOTO FILM CO LTD16 citations73
US4066565AJan 3, 1978
Process for producing cobalt- and iron-containing ferromagnetic powder
FUJI PHOTO FILM CO LTD14 citations73
US4179387ADec 18, 1979
Process for producing magnetic FE oxide
FUJI PHOTO FILM CO LTD9 citations71
US4948626AAug 14, 1990
Method for producing thin-film magnetic recording medium
FUJI PHOTO FILM CO LTD3 citations62
US4923748AMay 8, 1990
Magnetic recording medium
FUJI PHOTO FILM CO LTD3 citations62
US4982302AJan 1, 1991
Magnetic recording medium and method for magnetic recording and reproduction
FUJI PHOTO FILM CO LTD5 citations58
US4956229ASep 11, 1990
Magnetic recording medium
FUJI PHOTO FILM CO LTD1 citations52