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last 30 patents
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Patent Grant
Electrophotographic toner comprising lactone-modified epoxy resin
Patent number
4,978,596
Issue date
Dec 18, 1990
Hitachi, Ltd.
Ryuichi Shimizu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic plate having a protective layer of a fluorine-c...
Patent number
4,734,347
Issue date
Mar 29, 1988
Hitachi Chemical Co., Ltd.
Keiichi Endo
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Thermal transfer sheet
Patent number
4,690,858
Issue date
Sep 1, 1987
Hitachi, Ltd.
Hiroyuki Oka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
White ink composition for ink-jet printing
Patent number
4,680,058
Issue date
Jul 14, 1987
Hitachi, Ltd.
Ryuichi Shimizu
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
Electrophotographic process with magnetic brush development using s...
Patent number
4,640,880
Issue date
Feb 3, 1987
Hitachi Metals Co., Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Composite type photosensitive member having metal-free phthalocyani...
Patent number
4,619,879
Issue date
Oct 28, 1986
Hitachi, Ltd.
Atsushi Kakuta
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic recording medium containing .tau. and .eta. met...
Patent number
4,507,374
Issue date
Mar 26, 1985
Hitachi, Ltd.
Atsushi Kakuta
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Complex type electrophotographic plate and electrophotographic meth...
Patent number
4,435,492
Issue date
Mar 6, 1984
Hitachi, Ltd.
Shigeo Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic photosensitive material having thin amorphous s...
Patent number
4,430,404
Issue date
Feb 7, 1984
Hitachi, Ltd.
Akira Hosoya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic plate having an age-hardened aluminum substrate...
Patent number
4,405,703
Issue date
Sep 20, 1983
Hitachi, Ltd.
Shigeharu Onuma
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Complex type electrophotographic plate and electrophotographic meth...
Patent number
4,352,876
Issue date
Oct 5, 1982
Hitachi, Ltd.
Shigeo Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Complex type electrophotographic plate
Patent number
4,346,157
Issue date
Aug 24, 1982
Hitachi, Ltd.
Atsushi Kakuta
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Ink for ink-jet printer containing dichloromethane as an organic so...
Patent number
4,248,636
Issue date
Feb 3, 1981
Hitachi, Ltd.
Ryusei Sasaki
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Grant
One-component magnetic developer powder for developing electrostati...
Patent number
4,189,390
Issue date
Feb 19, 1980
Hitachi Metals, Ltd.
Koji Noguchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Liquid developer for electro photography
Patent number
4,156,034
Issue date
May 22, 1979
Hitachi, Ltd.
Akio Mukoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Organic photoconductive materials
Patent number
4,125,701
Issue date
Nov 14, 1978
Hitachi, Ltd.
Akio Mukoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY