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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Image forming apparatus and method of adjusting charge bias
Patent number
8,103,181
Issue date
Jan 24, 2012
Ricoh Company, Ltd.
Hitoshi Ishibashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus and method of adjusting charge bias
Patent number
7,778,560
Issue date
Aug 17, 2010
Ricoh Company, Ltd.
Hitoshi Ishibashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
6,033,818
Issue date
Mar 7, 2000
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotographic recording apparatus configured to switch a bias...
Patent number
5,897,243
Issue date
Apr 27, 1999
Ricoh Company, Ltd.
Satoru Komatsubara
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of coating a toner conveyor roller
Patent number
5,879,752
Issue date
Mar 9, 1999
Ricoh Company, Ltd.
Eisaku Murakami
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,845,183
Issue date
Dec 1, 1998
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an electrophotographic recording apparatus in...
Patent number
5,826,144
Issue date
Oct 20, 1998
Ricoh Company, Ltd.
Eiji Takenaka
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus with bias control to prevent undesirable to...
Patent number
5,768,665
Issue date
Jun 16, 1998
Ricoh Company, Ltd.
Tetsuo Yamanaka
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,708,942
Issue date
Jan 13, 1998
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device having the lengths of two toner transporting roll...
Patent number
5,697,026
Issue date
Dec 9, 1997
Ricoh Company, Ltd.
Iwao Matsumae
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing apparatus for electronic photographic recording equipmen...
Patent number
5,689,782
Issue date
Nov 18, 1997
Ricoh Company, Ltd.
Eisaku Murakami
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Device for electrostatically developing a latent image on an image...
Patent number
5,666,625
Issue date
Sep 9, 1997
Ricoh Company, Ltd.
Satoru Komatsubara
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner, and devices for electrostatically depositing a uniform appli...
Patent number
5,625,438
Issue date
Apr 29, 1997
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device having seals between a toner transport roller and...
Patent number
5,625,440
Issue date
Apr 29, 1997
Ricoh Company, Ltd.
Iwao Matsumae
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,625,441
Issue date
Apr 29, 1997
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Toner conveyor roller and image forming apparatus having the same
Patent number
5,617,191
Issue date
Apr 1, 1997
Ricoh Company, Ltd.
Eisaku Murakami
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,610,693
Issue date
Mar 11, 1997
Ricoh Company, Ltd.
Toshihiro Sugiyama
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,552,870
Issue date
Sep 3, 1996
Ricoh Company, Ltd.
Eisaku Murakami
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,489,747
Issue date
Feb 6, 1996
Ricoh Company, Ltd.
Eiji Takenaka
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing device for an image forming apparatus
Patent number
5,486,909
Issue date
Jan 23, 1996
Ricoh Company, Ltd.
Eiji Takenaka
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Patents Applications
last 30 patents
Information
Patent Application
IMAGE FORMING APPARATUS
Publication number
20200293243
Publication date
Sep 17, 2020
RICOH COMPANY, LTD.
Satoru TAO
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
DIAGNOSTIC APPARATUS, IMAGE DIAGNOSTIC METHOD, AND NON-TRANSITORY S...
Publication number
20200236225
Publication date
Jul 23, 2020
Toshiyuki HONGO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
IMAGE FOMRING APARATUS AND METHOD OF ADJUSTING CHARGE BIAS
Publication number
20100278549
Publication date
Nov 4, 2010
Hitoshi Ishibashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING CHARGE BIAS
Publication number
20080031646
Publication date
Feb 7, 2008
Hitoshi Ishibashi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY