Keiji Okamoto

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image forming apparatus
- Patent number 9,052,629
- Issue date Jun 9, 2015
- Ricoh Company Ltd.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Connector, charging device incorporating same, and image forming ap...
- Patent number 8,918,008
- Issue date Dec 23, 2014
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleaning device, and image forming apparatus, process cartridge, an...
- Patent number 8,798,516
- Issue date Aug 5, 2014
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleaning device, and image forming apparatus, process cartridge, an...
- Patent number 8,712,309
- Issue date Apr 29, 2014
- Ricoh Company, Ltd.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleaning device, and image forming apparatus, process cartridge, an...
- Patent number 8,364,070
- Issue date Jan 29, 2013
- Ricoh Company, Ltd.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Lubricant supplying unit, process unit incorporating same, image fo...
- Patent number 8,036,585
- Issue date Oct 11, 2011
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleaning device, process cartridge, and image forming apparatus
- Patent number 7,711,308
- Issue date May 4, 2010
- Ricoh Company, Ltd.
- Yoshiki Hozumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method and apparatus for image forming capable of preventing image...
- Patent number 7,319,475
- Issue date Jan 15, 2008
- Ricoh Company, Ltd.
- Yasumasa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Image forming cartridge and image forming apparatus
- Patent number 7,139,508
- Issue date Nov 21, 2006
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Sealing member which prevents contamination when removed and contai...
- Patent number 6,484,000
- Issue date Nov 19, 2002
- Ricoh Company, Ltd.
- Moriaki Ogawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Imaging forming apparatus with improved exhaust flow
- Patent number 5,390,006
- Issue date Feb 14, 1995
- Ricoh Company Ltd.
- Tomio Wakabayashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Waste toner collecting device for an image recorder
- Patent number 5,132,740
- Issue date Jul 21, 1992
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 5,055,878
- Issue date Oct 8, 1991
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner contamination preventive means
- Patent number 4,970,552
- Issue date Nov 13, 1990
- Ricoh Company, Ltd.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Light scanning device
- Patent number 4,943,128
- Issue date Jul 24, 1990
- Ricoh Company, Ltd.
- Hiromi Takada
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Transfer paper guide device for an electrostatic photographic appar...
- Patent number 4,939,550
- Issue date Jul 3, 1990
- Ricoh Company, Ltd.
- Hiromi Takada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Compact image recording apparatus having an up-side down structure
- Patent number 4,796,037
- Issue date Jan 3, 1989
- Ricoh Company, Limited
- Hiromi Takada
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Head rotating mechanism for a printer
- Patent number 4,776,715
- Issue date Oct 11, 1988
- Ricoh Company, Ltd.
- Hiromi Takada
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE
- Publication number 20150255287
- Publication date Sep 10, 2015
- RENESAS ELECTRONICS CORPORATION
- Kenichi SHOJI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20130071163
- Publication date Mar 21, 2013
- RICOH COMPANY, LTD.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
CONNECTOR, CHARGING DEVICE INCORPORATING SAME, AND IMAGE FORMING AP...
- Publication number 20120207507
- Publication date Aug 16, 2012
- RICOH COMPANY, LTD.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Cleaning device, and image forming apparatus, process cartridge, an...
- Publication number 20110229188
- Publication date Sep 22, 2011
- RICOH COMPANY, LTD.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Cleaning device, and image forming apparatus, process cartridge, an...
- Publication number 20110229186
- Publication date Sep 22, 2011
- RICOH COMPANY, LTD.
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Cleaning device, and image forming apparatus, process cartridge, an...
- Publication number 20110229233
- Publication date Sep 22, 2011
- RICOH COMPANY, LTD.
- Kazuhiko Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
LUBRICANT SUPPLYING UNIT, PROCESS UNIT INCORPORATING SAME, IMAGE FO...
- Publication number 20100061779
- Publication date Mar 11, 2010
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Connecting device, and small electronic apparatus and folding porta...
- Publication number 20090104949
- Publication date Apr 23, 2009
- Noriyoshi Sato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CLEANING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
- Publication number 20080063448
- Publication date Mar 13, 2008
- Yoshiki Hozumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming cartridge and image forming apparatus
- Publication number 20050169665
- Publication date Aug 4, 2005
- Keiji Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Method and apparatus for image forming capable of preventing image...
- Publication number 20050052719
- Publication date Mar 10, 2005
- Yasumasa Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Keiji Okamoto

Person

Patents Grantslast 30 patents

Image forming apparatus

Connector, charging device incorporating same, and image forming ap...

Cleaning device, and image forming apparatus, process cartridge, an...

Cleaning device, and image forming apparatus, process cartridge, an...

Cleaning device, and image forming apparatus, process cartridge, an...

Lubricant supplying unit, process unit incorporating same, image fo...

Cleaning device, process cartridge, and image forming apparatus

Method and apparatus for image forming capable of preventing image...

Image forming cartridge and image forming apparatus

Sealing member which prevents contamination when removed and contai...

Imaging forming apparatus with improved exhaust flow

Waste toner collecting device for an image recorder

Image forming apparatus

Toner contamination preventive means

Light scanning device

Transfer paper guide device for an electrostatic photographic appar...

Compact image recording apparatus having an up-side down structure

Head rotating mechanism for a printer

Patents Applicationslast 30 patents

MANUFACTURING METHOD OF SEMICONDUCTOR DEVICE

IMAGE FORMING APPARATUS

CONNECTOR, CHARGING DEVICE INCORPORATING SAME, AND IMAGE FORMING AP...

Cleaning device, and image forming apparatus, process cartridge, an...

Cleaning device, and image forming apparatus, process cartridge, an...

Cleaning device, and image forming apparatus, process cartridge, an...

LUBRICANT SUPPLYING UNIT, PROCESS UNIT INCORPORATING SAME, IMAGE FO...

Connecting device, and small electronic apparatus and folding porta...

CLEANING DEVICE, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

Image forming cartridge and image forming apparatus

Method and apparatus for image forming capable of preventing image...