Katsuichi Ohta

Person

Shizuoka, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic photoconductor and method for producing the sam...
- Patent number 7,955,768
- Issue date Jun 7, 2011
- Ricoh Company, Ltd.
- Hiromi Tada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Coating liquid and electrophotographic photoreceptor prepared using...
- Patent number 7,824,830
- Issue date Nov 2, 2010
- Ricoh Company Limited
- Maiko Kondo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Image forming method
- Patent number 7,670,743
- Issue date Mar 2, 2010
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, method of image formation, image...
- Patent number 7,560,203
- Issue date Jul 14, 2009
- Ricoh Company, Ltd.
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Coating liquid for intermediate layer in electrophotographic photoc...
- Patent number 7,534,538
- Issue date May 19, 2009
- Ricoh Company, Ltd.
- Tatsuya Niimi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, and image forming apparatus and...
- Patent number 7,507,511
- Issue date Mar 24, 2009
- Ricoh Company Ltd.
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photoconductor, image forming apparatus, image forming process, and...
- Patent number 7,371,490
- Issue date May 13, 2008
- Ricoh Company, Ltd.
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, method for manufacturing the ele...
- Patent number 7,371,491
- Issue date May 13, 2008
- Ricoh Company Limited
- Tatsuya Niimi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Measurement of frictional resistance of photoconductor against belt...
- Patent number 7,177,570
- Issue date Feb 13, 2007
- Ricoh Company, Limited
- Hiroshi Nagame
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, method for manufacturing the pho...
- Patent number 6,844,124
- Issue date Jan 18, 2005
- Ricoh Company Limited
- Hiroshi Ikuno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation unit including stored performance information
- Patent number 6,707,480
- Issue date Mar 16, 2004
- Ricoh Company, Ltd.
- Minoru Ameyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, method for manufacturing the pho...
- Patent number 6,641,964
- Issue date Nov 4, 2003
- Ricoh Company Limited
- Hiroshi Ikuno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoreceptor, and process cartridge and image...
- Patent number 6,326,112
- Issue date Dec 4, 2001
- Ricoh Company Limited
- Hiroshi Tamura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor containing charge generating azo...
- Patent number 5,863,683
- Issue date Jan 26, 1999
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor containing disazo and trisazo pi...
- Patent number 5,578,405
- Issue date Nov 26, 1996
- Ricoh Company
- Takaaki Ikegami
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photoconductive composition containing trisazo and disazo compounds
- Patent number 5,370,954
- Issue date Dec 6, 1994
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic copying apparatus having photoconductor with ma...
- Patent number 5,105,222
- Issue date Apr 14, 1992
- Ricoh Company, Ltd.
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor with undercoat layer containing...
- Patent number 4,906,545
- Issue date Mar 6, 1990
- Ricoh Company, Ltd.
- Toshio Fukagai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor comprising charge generating and...
- Patent number 4,863,822
- Issue date Sep 5, 1989
- Ricoh Company Ltd.
- Toshio Fukagai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic photoconductor with layer preventing charge inj...
- Patent number 4,822,705
- Issue date Apr 18, 1989
- Ricoh Company, Ltd.
- Toshio Fukagai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Layered photosensitive material for electrophotography
- Patent number 4,775,605
- Issue date Oct 4, 1988
- Ricoh Co., Ltd.
- Kenji Seki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND METHOD FOR PRODUCING THE SAM...
- Publication number 20090035017
- Publication date Feb 5, 2009
- Hiromi TADA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus and process cartridge
- Publication number 20080227007
- Publication date Sep 18, 2008
- Ricoh Company, Ltd.
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080145778
- Publication date Jun 19, 2008
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic photoreceptor, method of image formation, image...
- Publication number 20070154825
- Publication date Jul 5, 2007
- RICOH COMPANY, LTD.
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20060197823
- Publication date Sep 7, 2006
- Katsuichi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic photoreceptor, and image forming apparatus and...
- Publication number 20060177749
- Publication date Aug 10, 2006
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Coating liquid and electrophotographic photoreceptor prepared using...
- Publication number 20060134540
- Publication date Jun 22, 2006
- Maiko Kondo
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Coating liquid for intermediate layer in electrophotographic photoc...
- Publication number 20060057479
- Publication date Mar 16, 2006
- Tatsuya Niimi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Photoconductor, image forming apparatus, image forming process, and...
- Publication number 20050175911
- Publication date Aug 11, 2005
- Nozomu Tamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic photoreceptor, method for manufacturing the ele...
- Publication number 20050069797
- Publication date Mar 31, 2005
- Tatsuya Niimi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus, process cartridge, and image forming method
- Publication number 20040234294
- Publication date Nov 25, 2004
- Hiroshi Nagame
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic photoreceptor, method for manufacturing the pho...
- Publication number 20040048178
- Publication date Mar 11, 2004
- Hiroshi Ikuno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image formation unit and image formation apparatus
- Publication number 20020135655
- Publication date Sep 26, 2002
- Minoru Ameyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Electrophotographic photoreceptor, method for manufacturing the pho...
- Publication number 20020115005
- Publication date Aug 22, 2002
- Hiroshi Ikuno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Katsuichi Ohta

Person

Patents Grantslast 30 patents

Electrophotographic photoconductor and method for producing the sam...

Coating liquid and electrophotographic photoreceptor prepared using...

Image forming method

Electrophotographic photoreceptor, method of image formation, image...

Coating liquid for intermediate layer in electrophotographic photoc...

Electrophotographic photoreceptor, and image forming apparatus and...

Photoconductor, image forming apparatus, image forming process, and...

Electrophotographic photoreceptor, method for manufacturing the ele...

Measurement of frictional resistance of photoconductor against belt...

Electrophotographic photoreceptor, method for manufacturing the pho...

Image formation unit including stored performance information

Electrophotographic photoreceptor, method for manufacturing the pho...

Electrophotographic photoreceptor, and process cartridge and image...

Electrophotographic photoconductor containing charge generating azo...

Electrophotographic photoconductor containing disazo and trisazo pi...

Photoconductive composition containing trisazo and disazo compounds

Electrophotographic copying apparatus having photoconductor with ma...

Electrophotographic photoconductor with undercoat layer containing...

Electrophotographic photoconductor comprising charge generating and...

Electrophotographic photoconductor with layer preventing charge inj...

Layered photosensitive material for electrophotography

Patents Applicationslast 30 patents

ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR AND METHOD FOR PRODUCING THE SAM...

Image forming apparatus and process cartridge

IMAGE FORMING APPARATUS

Electrophotographic photoreceptor, method of image formation, image...

Image forming apparatus

Electrophotographic photoreceptor, and image forming apparatus and...

Coating liquid and electrophotographic photoreceptor prepared using...

Coating liquid for intermediate layer in electrophotographic photoc...

Photoconductor, image forming apparatus, image forming process, and...

Electrophotographic photoreceptor, method for manufacturing the ele...

Image forming apparatus, process cartridge, and image forming method

Electrophotographic photoreceptor, method for manufacturing the pho...

Image formation unit and image formation apparatus

Electrophotographic photoreceptor, method for manufacturing the pho...