Tsutomu Nakagawa

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Development apparatus having two developer bearers and two developm...
- Patent number 8,041,269
- Issue date Oct 18, 2011
- Ricoh Co., Ltd.
- Tatsuya Kubo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and developing device
- Patent number 7,792,466
- Issue date Sep 7, 2010
- Ricoh Company, Ltd.
- Masayoshi Nakayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation apparatus
- Patent number 7,792,441
- Issue date Sep 7, 2010
- Ricoh Company, Ltd.
- Shinichi Akatsu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming system having charge balancing system
- Patent number 7,689,153
- Issue date Mar 30, 2010
- Ricoh Company, Ltd.
- Tsutomu Nakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device in image-forming device
- Patent number 7,580,657
- Issue date Aug 25, 2009
- Ricoh Company, Ltd.
- Susumu Tateyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color monitor white chromaticity measuring device
- Patent number 7,538,791
- Issue date May 26, 2009
- Dai Nippon Printing Co., Ltd.
- Tohru Sugiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Fixing device including heating roller and pressure roller
- Patent number 7,324,778
- Issue date Jan 29, 2008
- Ricoh Printing Systems, Ltd.
- Takashi Suzuki
- 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

Patents Applicationslast 30 patents

Information Patent Application
IMAGE FORMATION APPARATUS
- Publication number 20080019718
- Publication date Jan 24, 2008
- Shinichi Akatsu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPMENT APPARATUS AND IMAGE FORMING APPARATUS
- Publication number 20070280744
- Publication date Dec 6, 2007
- Tatsuya Kubo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND DEVELOPING DEVICE
- Publication number 20070274742
- Publication date Nov 29, 2007
- Masayoshi Nakayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing device in image-forming device
- Publication number 20070025773
- Publication date Feb 1, 2007
- Susumu Tateyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Color monitor white chromaticity measuring device
- Publication number 20060164513
- Publication date Jul 27, 2006
- Tohru Sugiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Tone reproduction characteristics measuring device for color monitor
- Publication number 20060132867
- Publication date Jun 22, 2006
- Tohru Sugiyama
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Fixing device
- Publication number 20060002749
- Publication date Jan 5, 2006
- Ricoh Printing Systems, Ltd.
- Takashi Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming system
- Publication number 20050271431
- Publication date Dec 8, 2005
- Ricoh Printing Systems, Ltd.
- Tsutomu Nakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Tsutomu Nakagawa

Person

Patents Grantslast 30 patents

Development apparatus having two developer bearers and two developm...

Image forming apparatus and developing device

Image formation apparatus

Image forming system having charge balancing system

Developing device in image-forming device

Color monitor white chromaticity measuring device

Fixing device including heating roller and pressure roller

Electrophotographic apparatus

Patents Applicationslast 30 patents

IMAGE FORMATION APPARATUS

DEVELOPMENT APPARATUS AND IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS AND DEVELOPING DEVICE

Developing device in image-forming device

Color monitor white chromaticity measuring device

Tone reproduction characteristics measuring device for color monitor

Fixing device

Image forming system