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Patents Grants
last 30 patents
Information
Patent Grant
Image forming apparatus, process cartridge, cleaning system, and im...
Patent number
7,840,152
Issue date
Nov 23, 2010
Ricoh Company, Limited
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus including controller to detect condition of...
Patent number
7,639,957
Issue date
Dec 29, 2009
Ricoh Company, Ltd.
Shinji Kato
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus to prevent toner deformation
Patent number
7,548,349
Issue date
Jun 16, 2009
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and image forming apparatus for same
Patent number
7,515,860
Issue date
Apr 7, 2009
Ricoh Company, Ltd.
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image processing apparatus, process cartridge, and cleaning system...
Patent number
7,499,664
Issue date
Mar 3, 2009
Ricoh Company, Limited
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus, process cartridge and cleaningless system
Patent number
7,315,711
Issue date
Jan 1, 2008
Ricoh Company, Ltd.
Osamu Ariizumi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and image forming apparatus for same
Patent number
7,273,688
Issue date
Sep 25, 2007
Ricoh Company, Ltd.
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus controlling polarity of residual toner and...
Patent number
7,218,879
Issue date
May 15, 2007
Ricoh Company, Ltd.
Shigekazu Enoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus and image forming method
Patent number
7,162,187
Issue date
Jan 9, 2007
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and toner for use in the method
Patent number
7,150,954
Issue date
Dec 19, 2006
Ricoh Company, Ltd.
Mitsuo Aoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and image forming apparatus for same
Patent number
7,125,638
Issue date
Oct 24, 2006
Ricoh Company, Ltd.
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image-forming apparatus and image-forming method
Patent number
6,934,484
Issue date
Aug 23, 2005
Ricoh Company, Ltd.
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method and toner for use in the method
Patent number
6,899,986
Issue date
May 31, 2005
Ricoh Company, Ltd.
Mitsuo Aoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner, developer and image forming method using the toner
Patent number
6,835,517
Issue date
Dec 28, 2004
Ricoh Company, Ltd.
Maiko Kondo
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method and apparatus for controlling process condition for image fo...
Patent number
5,508,787
Issue date
Apr 16, 1996
Ricoh Company, Ltd.
Shin Hasegawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner recovery system which detects linear movement of a recovered...
Patent number
5,400,127
Issue date
Mar 21, 1995
Ricoh Company, Ltd.
Makoto Arai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner concentration control method
Patent number
5,387,965
Issue date
Feb 7, 1995
Ricoh Company, Ltd.
Shin Hasegawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming method
Patent number
5,327,196
Issue date
Jul 5, 1994
Ricoh Company, Ltd.
Shinji Kato
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of controlling image formation in image generating apparatus
Patent number
5,049,939
Issue date
Sep 17, 1991
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image density control method
Patent number
5,038,175
Issue date
Aug 6, 1991
Ricoh Company
Norimasa Sohmiya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image density control method for an image forming apparatus
Patent number
5,006,896
Issue date
Apr 9, 1991
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner density control device for an image recorder
Patent number
4,962,394
Issue date
Oct 9, 1990
Ricoh Company, Ltd.
Norimasa Sohmiya
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Cleaning device for an image forming apparatus
Patent number
4,885,612
Issue date
Dec 5, 1989
Ricoh Company, Ltd.
Tsumori Satoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Corona wire cleaning device utilizing a position detection system
Patent number
4,885,466
Issue date
Dec 5, 1989
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Control of toner concentration in a developer
Patent number
4,734,737
Issue date
Mar 29, 1988
Ricoh Company, Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Recording image density control method for electrophotography
Patent number
4,639,117
Issue date
Jan 27, 1987
Ricoh Company, Ltd.
Kazuo Murai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of forming images of sensor patterns in effecting image dens...
Patent number
4,551,005
Issue date
Nov 5, 1985
Ricoh Company Ltd.
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner supply control method for electrophotographic copier
Patent number
4,522,481
Issue date
Jun 11, 1985
Ricoh Company, Ltd.
Chikara Imai
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrostatographic copying apparatus with automatic toner density...
Patent number
4,279,498
Issue date
Jul 21, 1981
Ricoh Company, Ltd.
Tadahiro Eda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Patents Applications
last 30 patents
Information
Patent Application
IMAGE FORMING APPARATUS, PROCESS CARTRIDGE, CLEANING SYSTEM, AND IM...
Publication number
20090116863
Publication date
May 7, 2009
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
IMAGE FORMING METHOD AND IMAGE FORMING APPARATUS FOR SAME
Publication number
20070286652
Publication date
Dec 13, 2007
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
IMAGE FORMING APPARATUS HAVING ENHANCED IMAGE FORMING CONDITION
Publication number
20070248368
Publication date
Oct 25, 2007
Shinji Kato
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming method and image forming apparatus for same
Publication number
20060275688
Publication date
Dec 7, 2006
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus, process cartridge and cleaningless system
Publication number
20050276632
Publication date
Dec 15, 2005
Osamu Ariizumi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus, process cartridge, cleaning system, and im...
Publication number
20050169668
Publication date
Aug 4, 2005
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus and process cartridge for use in the same
Publication number
20050141917
Publication date
Jun 30, 2005
Shigekazu Enoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming method and toner for use in the method
Publication number
20050079430
Publication date
Apr 14, 2005
Mitsuo Aoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus
Publication number
20050030595
Publication date
Feb 10, 2005
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming apparatus and image forming method
Publication number
20050025535
Publication date
Feb 3, 2005
Yasushi Koichi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming method and image forming apparatus for same
Publication number
20040241566
Publication date
Dec 2, 2004
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image-forming apparatus and image-forming method
Publication number
20040076443
Publication date
Apr 22, 2004
Koji Suzuki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Image forming method and toner for use in the method
Publication number
20030186155
Publication date
Oct 2, 2003
Mitsuo Aoki
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
Toner, developer and image forming method using the toner
Publication number
20030082472
Publication date
May 1, 2003
Maiko Kondo
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY