Inventor
IDOGAWA HIROYUKI
JP5 patents
Patents
5 patentsUS5965634AOct 12, 1999
Water base ink composition
MITSUBISHI PENCIL CO51 citations93
US5942560AAug 24, 1999
Colored resin fine particle water base dispersion liquid for water base ink
MITSUBISHI PENCIL CO40 citations90
US6160035ADec 12, 2000
Oil-base pigment ink composition for writing tools
MITSUBISHI PENCIL CO4 citations59
US5498281AMar 12, 1996
Recording material containing carbonaceous powder whose surface is modified with fluorine gas
MITSUBISHI PENCIL CO4 citations59
US5437715AAug 1, 1995
Recording material containing carbonaceous powder whose surface is modified with fluorine gas
MITSUBISHI PENCIL CO4 citations59