P

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 patents
US5059356AOct 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

NIKON CORP

2 patents

SYSTEM INSTRUMENTS CO LTD

1 patent

RYOJI TAMURA

1 patent

HATTORI YUKO

1 patent

NISHIZAWA TSUTOMU

1 patent