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Tsuneaki Kawanishi
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Patents Grants
last 30 patents
Information
Patent Grant
Developing device and electrophotographic apparatus using the same
Patent number
7,574,164
Issue date
Aug 11, 2009
Ricoh Company Ltd.
Hisao Okada
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrostatic charge image developing toner, and developer, image f...
Patent number
7,144,667
Issue date
Dec 5, 2006
Ricoh Printing Systems, Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and image forming apparatus
Patent number
7,090,956
Issue date
Aug 15, 2006
Ricoh Printing Systems, Ltd.
Katsuhiko Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic toner and image-forming system
Patent number
7,022,448
Issue date
Apr 4, 2006
Ricoh Printing Systems, Ltd.
Shigenori Yaguchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus with transfer bias inverting function
Patent number
6,829,449
Issue date
Dec 7, 2004
Hitachi Printing Solutions, Ltd.
Hiroyoshi Matsumoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electro-photographic developing unit
Patent number
6,813,462
Issue date
Nov 2, 2004
Hitachi Printing Solutions, Ltd.
Teruaki Mitsuya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrostatic image developing toner and image forming method
Patent number
6,783,909
Issue date
Aug 31, 2004
Hitachi Printing Solutions, Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrostatic charge developing toner and image forming method usin...
Patent number
6,696,210
Issue date
Feb 24, 2004
Hitachi Printing Solutions, Ltd.
Shigenori Yaguchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrostatic recording apparatus
Patent number
6,157,798
Issue date
Dec 5, 2000
Hitachi Koki Co., Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic apparatus
Patent number
5,923,933
Issue date
Jul 13, 1999
Hitachi Koki Co., Ltd.
Masayasu Anzai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner for recording electrostatic image and electrostatic recording...
Patent number
5,832,347
Issue date
Nov 3, 1998
Hitachi Koki Co., Ltd.
Katsuya Kawai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus having a photosensitive body formed of a ba...
Patent number
5,701,560
Issue date
Dec 23, 1997
Hitachi Koki Co., Ltd.
Akio Tsujita
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Belt-type fixing device having an irregular surface contour
Patent number
5,649,273
Issue date
Jul 15, 1997
Hitachi, Ltd.
Ryuuichi Shimizu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Fixing device for electrophotography and electrophotographic appara...
Patent number
5,519,479
Issue date
May 21, 1996
Hitachi, Ltd.
Ryuuichi Shimizu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Fixing device for electrophotography and electrophotographic appara...
Patent number
5,508,138
Issue date
Apr 16, 1996
Hitachi, Ltd.
Ryuuichi Shimizu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Fixing device for electrophotography and electrophotographic appara...
Patent number
5,363,180
Issue date
Nov 8, 1994
Hitachi, Ltd.
Ryuuichi Shimizu
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image fixing device and electrophotographic apparatus incorporated...
Patent number
5,345,301
Issue date
Sep 6, 1994
Hitachi, Ltd.
Toshiya Satoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Photosensitive element for electrophotography
Patent number
5,215,842
Issue date
Jun 1, 1993
Hitachi, Ltd.
Sukekazu Aratani
C07 - ORGANIC CHEMISTRY
Information
Patent Grant
Electrophotographic photoreceptor and method of producing the same
Patent number
4,990,418
Issue date
Feb 5, 1991
Hitachi, Ltd.
Akio Mukoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
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
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
Electrophotographic developing method using magnetic toners
Patent number
4,433,042
Issue date
Feb 21, 1984
Hitachi Metals, Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Magnetic toner for electrostatic images and transfer copying
Patent number
4,265,993
Issue date
May 5, 1981
Hitachi Metals, Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Patents Applications
last 30 patents
Information
Patent Application
Developing device and electrophotographic apparatus using the same
Publication number
20070172262
Publication date
Jul 26, 2007
Ricoh Printing Systems, Ltd.
Hisao Okada
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrostatic charge image developing toner, and developer, image f...
Publication number
20040175640
Publication date
Sep 9, 2004
Hitachi Printing Solutions, Ltd.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrostatic charge image developing toner and image forming appar...
Publication number
20040058259
Publication date
Mar 25, 2004
HITACHI PRINTING SOLUTIONS, LTD.
Junji Kobayashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus
Publication number
20040052541
Publication date
Mar 18, 2004
HITACHI PRINTING SOLUTIONS, LTD.
Hiroyoshi Matsumoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrophotographic toner and image-forming system
Publication number
20040043317
Publication date
Mar 4, 2004
HITACHI PRINTING SOLUTIONS, LTD.
Shigenori Yaguchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Developing unit and electro-photographic apparatus
Publication number
20030143001
Publication date
Jul 31, 2003
HITACHI PRINTING SOLUTIONS, LTD.
Teruaki Mitsuya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrostatic image developing toner and image forming method
Publication number
20030134216
Publication date
Jul 17, 2003
HITACHI PRINTING SOLUTIONS, LTD.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Electrostatic charge developing toner and image forming method usin...
Publication number
20020160291
Publication date
Oct 31, 2002
Shigenori Yaguchi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming method and image forming apparatus
Publication number
20020127488
Publication date
Sep 12, 2002
Katsuhiko Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Toner for developing electrostatic charge image and image forming a...
Publication number
20020022189
Publication date
Feb 21, 2002
HITACHI KOKI CO., LTD.
Tsuneaki Kawanishi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY