Inventor
NISHIZAWA TSUTOMU
38 patents
⚠️ This page may combine multiple inventors who share the name “NISHIZAWA TSUTOMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MITSUI TOATSU CHEMICALS
32 patentsUS5059356AOct 22, 1991
Polarizing film
MITSUI TOATSU CHEMICALS67 citations95
US4824882AApr 25, 1989
Polarizing film
MITSUI TOATSU CHEMICALS78 citations95
US4808503AFeb 28, 1989
Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide
MITSUI TOATSU CHEMICALS36 citations93
US5286418AFeb 15, 1994
Polarizing film
MITSUI TOATSU CHEMICALS44 citations92
US5024926AJun 18, 1991
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS39 citations92
US4960538AOct 2, 1990
1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same
MITSUI TOATSU CHEMICALS24 citations92
US4842781AJun 27, 1989
Colored polarizing film and method of making same
MITSUI TOATSU CHEMICALS49 citations92
US4360447ANov 23, 1982
Composition for liquid crystal color display elements
MITSUI TOATSU CHEMICALS38 citations89
US4304683ADec 8, 1981
Composition for liquid crystal color display element
MITSUI TOATSU CHEMICALS34 citations89
US5446141AAug 29, 1995
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS9 citations74
US5072021ADec 10, 1991
Optically active naphthalene derivatives
MITSUI TOATSU CHEMICALS16 citations74
US4970021ANov 13, 1990
Phthalocyanine compounds and utility thereof
MITSUI TOATSU CHEMICALS9 citations74
US5354513AOct 11, 1994
Polarizing film
MITSUI TOATSU CHEMICALS11 citations73
US5235104AAug 10, 1993
Hydrazones and electrophotographic photoreceptors comprising them
MITSUI TOATSU CHEMICALS9 citations73
US5132190AJul 21, 1992
Hydrozones and electrophotographic photoreceptors comprising them
MITSUI TOATSU CHEMICALS8 citations73
US4555355ANov 26, 1985
Composition for liquid crystal color display
MITSUI TOATSU CHEMICALS10 citations73
US4459218AJul 10, 1984
Composition for liquid crystal color display
MITSUI TOATSU CHEMICALS6 citations73
US4734218AMar 29, 1988
Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs
MITSUI TOATSU CHEMICALS8 citations72
US4302396ANov 24, 1981
Chlorinated 4-methylphthalic anhydrides
MITSUI TOATSU CHEMICALS12 citations72
US5582774ADec 10, 1996
Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same
MITSUI TOATSU CHEMICALS5 citations63
US5382465AJan 17, 1995
Anthraquinonic colorant and polarizing film containing the colorant
MITSUI TOATSU CHEMICALS3 citations63
US5252769AOct 12, 1993
Anthraquinonic colorant and polarizing film containing the colorant
MITSUI TOATSU CHEMICALS2 citations63
US5023343AJun 11, 1991
P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them
MITSUI TOATSU CHEMICALS1 citations63
US4963449AOct 16, 1990
P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them
MITSUI TOATSU CHEMICALS4 citations63
US3960479AJun 1, 1976
Coloring of organic materials with asymmetric thioindigoid compounds
MITSUI TOATSU CHEMICALS3 citations61
US4473486ASep 25, 1984
Composition for liquid crystal color display elements
MITSUI TOATSU CHEMICALS2 citations60
US4033923AJul 5, 1977
Coloring resins by mixing naphthacenequinones therewith
MITSUI TOATSU CHEMICALS6 citations59
US4808507AFeb 28, 1989
Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based
MITSUI TOATSU CHEMICALS0 citations52
US4032539AJun 28, 1977
Coloring of organic materials with asymmetric thioindigoid compounds
MITSUI TOATSU CHEMICALS1 citations51
US4536320AAug 20, 1985
Nematic liquid crystalline composition
MITSUI TOATSU CHEMICALS1 citations49
US3986826AOct 19, 1976
Dyeing synthetic and semisynthetic materials with naphthacenequinine derivatives
MITSUI TOATSU CHEMICALS0 citations49
US4552684ANov 12, 1985
Dichroic dye and liquid crystalline composition for color display
MITSUI TOATSU CHEMICALS1 citations47