Inventor

Tsutomu Nishizawa

Inventor

Yokohama, JP

Overview

39→

Patents

1976–2012

Patent span

Chemistry

Primary field (CPC C)

Patents· 39 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C09Bprimary

C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments23%

C09KMaterials for miscellaneous applications, not provided for elsewhere14%

G02BOptical elements, systems or apparatus8%

G03GElectrography6%

G11BInformation storage based on relative movement between record carrier and transducer6%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%

C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients5%

C07CAcyclic or carbocyclic compounds4%

C07DHeterocyclic compounds4%

H04NPictorial communication, e.g. television4%

PatentTitleYear

8,150,188'Imaging apparatus'2012 8,139,856'Image processing apparatus, imaging apparatus, and computer readable medium irregularizing pixel signals continuous in level near a saturation level'2012 7,922,621'Physical exercise condition detecting apparatus of muscle force training machine'2011 7,701,485'High resolution imaging apparatus with reduced data'2010 7,391,448'Imaging device'2008 6,849,431'Non-B, non-C, non-G hepatitis virus gene, polynucleotide, polypeptide, virus particle, method for isolating virus particle, and method for detecting virus'2005 5,582,774'Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same'1996 5,449,587'Compact disk-write once type optical recording media'1995 5,446,141'Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same'1995 5,382,465'Anthraquinonic colorant and polarizing film containing the colorant'1995 5,354,513'Polarizing film'1994 5,286,418'Polarizing film'1994 5,252,769'Anthraquinonic colorant and polarizing film containing the colorant'1993 5,235,104'Hydrazones and electrophotographic photoreceptors comprising them'1993 5,132,190'Hydrozones and electrophotographic photoreceptors comprising them'1992 5,072,021'Optically active naphthalene derivatives'1991 5,059,356'Polarizing film'1991 5,024,926'Alkylphthalocyanine near-infrared absorbers and recording/display materials using the same'1991 5,023,343'P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them'1991 4,970,021'Phthalocyanine compounds and utility thereof'1990 4,963,449'P-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing them'1990 4,960,538'1,2-naphthalocyanine near-infrared absorbent and recording/display materials using same'1990 4,842,781'Colored polarizing film and method of making same'1989 4,824,882'Polarizing film'1989 4,808,507'Electrophotographic photoreceptor 2-Phenyl-benzooxazole bisazo based'1989 4,808,503'Electrophotographic receptors with charge generating azo-substituted tetraphenyl-thiophene or thiophene 1,1-dioxide'1989 4,734,218'Dichroic azo dyestuffs and liquid crystal composition containing said dyestuffs'1988 4,555,355'Composition for liquid crystal color display'1985 4,552,684'Dichroic dye and liquid crystalline composition for color display'1985 4,536,320'Nematic liquid crystalline composition'1985 4,473,486'Composition for liquid crystal color display elements'1984 4,459,218'Composition for liquid crystal color display'1984 4,360,447'Composition for liquid crystal color display elements'1982 4,304,683'Composition for liquid crystal color display element'1981 4,302,396'Chlorinated 4-methylphthalic anhydrides'1981 4,033,923'Coloring resins by mixing naphthacenequinones therewith'1977 4,032,539'Coloring of organic materials with asymmetric thioindigoid compounds'1977 3,986,826'Dyeing synthetic and semisynthetic materials with naphthacenequinine derivatives'1976 3,960,479'Coloring of organic materials with asymmetric thioindigoid compounds'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1996Patents assigned to MITSUI TOATSU CHEMICALS (33)· patent assignee history

1976–1981Based in Kamakura, JP· patent location history

1981–1985Based in Ohmuta, JP· patent location history

1985–1996Based in Yokohama, JP· patent location history

1990–1996Patents assigned to YAMAMOTO CHEMICALS INC (6)· patent assignee history

2008–2012Patents assigned to NIKON CORP (4)· patent assignee history

2008–2012Based in Kawasaki, JP· patent location history

2011Based in Hachioji, JP· patent location history

2012Patents assigned to NISHIZAWA TSUTOMU (2)· patent assignee history

2012Patents assigned to HATTORI YUKO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
MITSUI TOATSU CHEMICALS	33	1976–1996
YAMAMOTO CHEMICALS INC	6	1990–1996
NIKON CORP	4	2008–2012
NISHIZAWA TSUTOMUself	2	2012
HATTORI YUKO	1	2012

Locations

Location	Patents	Span
Yokohama, JP	22	1985–1996
Ohmuta, JP	5	1981–1985
Kamakura, JP	5	1976–1981
Kawasaki, JP	4	2008–2012
Hachioji, JP	1	2011