Toshihiko Koizumi

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Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic photoconductor, and electrophotographic method,...
- Patent number 8,349,529
- Issue date Jan 8, 2013
- Ricoh Company, Ltd.
- Keisuke Shimoyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor and electrophotographic apparatus
- Patent number 8,263,297
- Issue date Sep 11, 2012
- Ricoh Company, Ltd.
- Takaaki Ikegami
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor, process cartridge and image for...
- Patent number 8,257,891
- Issue date Sep 4, 2012
- Ricoh Company, Ltd.
- Naoki Nakatake
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor and electrophotographic apparatus
- Patent number 7,704,655
- Issue date Apr 27, 2010
- Yamanashi Electronics Co., Ltd.
- Hajime Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, AND ELECTROPHOTOGRAPHIC METHOD,...
- Publication number 20100290807
- Publication date Nov 18, 2010
- Keisuke SHIMOYAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic Photoconductor
- Publication number 20100233602
- Publication date Sep 16, 2010
- RICOH COMPANY, LTD.
- Kohsuke Yamamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, PROCESS CARTRIDGE AND IMAGE FOR...
- Publication number 20100178074
- Publication date Jul 15, 2010
- RICOH COMPANY, LTD.
- Naoki NAKATAKE
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND ELECTROPHOTOGRAPHIC APPARATUS
- Publication number 20090136260
- Publication date May 28, 2009
- Ricoh Company, Ltd,
- Takaaki IKEGAMI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTROPHOTOGRAPHIC PHOTORECEPTOR AND ELECTROPHOTOGRAPHIC APPARATUS
- Publication number 20090004585
- Publication date Jan 1, 2009
- YAMANASHI ELECTRONICS CO., LTD.
- Hajime Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY