Tetsumaru Fujita

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Light deflector, distance measuring device, projection device, and...
- Patent number 12,135,416
- Issue date Nov 5, 2024
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G02 - OPTICS
Information Patent Grant
Electronic device
- Patent number 11,946,860
- Issue date Apr 2, 2024
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G01 - MEASURING TESTING
Information Patent Grant
Developing device, and image forming apparatus and process unit inc...
- Patent number 10,036,976
- Issue date Jul 31, 2018
- Ricoh Company, Ltd.
- Yuji Nagatomo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and image forming apparatus incorporating same
- Patent number 9,958,806
- Issue date May 1, 2018
- Ricoh Company, Ltd.
- Masato Tsuji
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner container, process cartridge, and image forming apparatus
- Patent number 9,201,393
- Issue date Dec 1, 2015
- Ricoh Company, Ltd.
- Yuusuke Furuichi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Sealing assembly, developing device, process unit, and image formin...
- Patent number 9,014,593
- Issue date Apr 21, 2015
- Ricoh Company, Ltd.
- Yasunobu Ogata
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and process unit and image forming apparatus inco...
- Patent number 9,002,243
- Issue date Apr 7, 2015
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development device, processing unit and image forming apparatus
- Patent number 8,688,015
- Issue date Apr 1, 2014
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and toner supply method
- Patent number 8,594,519
- Issue date Nov 26, 2013
- Ricoh Company, Ltd.
- Naoki Nakatake
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing unit, image forming apparatus, and process cartridge
- Patent number 8,503,892
- Issue date Aug 6, 2013
- Ricoh Company, Limited
- Kohta Sakaya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and toner supply method
- Patent number 8,483,583
- Issue date Jul 9, 2013
- Ricoh Company, Ltd.
- Atsushi Takehara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus which mixes new unused toner with used old...
- Patent number 8,452,216
- Issue date May 28, 2013
- Ricoh Company, Limited
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus, image forming method, and developing device
- Patent number 8,406,664
- Issue date Mar 26, 2013
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Semiconductive member, and developing roll, charging roll, transfer...
- Patent number 8,354,164
- Issue date Jan 15, 2013
- Ricoh Company, Limited
- Chiyoshi Nozaki
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Process cartridge and image forming apparatus including a toner cha...
- Patent number 8,036,573
- Issue date Oct 11, 2011
- Ricoh Company, Ltd.
- Hidekazu Shono
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,907,871
- Issue date Mar 15, 2011
- Ricoh Company, Ltd.
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,903,993
- Issue date Mar 8, 2011
- Ricoh Company, Ltd.
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,822,356
- Issue date Oct 26, 2010
- Ricoh Company, Ltd.
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process cartridge and image forming apparatus including same
- Patent number 7,796,935
- Issue date Sep 14, 2010
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming method and apparatus which uses alternating voltage t...
- Patent number 7,796,912
- Issue date Sep 14, 2010
- Ricoh Company Limited
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus including a brush member to temporarily cap...
- Patent number 7,792,463
- Issue date Sep 7, 2010
- Ricoh Company, Limited
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleanerless image forming apparatus
- Patent number 7,751,753
- Issue date Jul 6, 2010
- Ricoh Company, Ltd.
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming method and apparatus for effectively charging an imag...
- Patent number 7,738,803
- Issue date Jun 15, 2010
- Ricoh Company Limited
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and process cartridge employing the same ha...
- Patent number 7,734,223
- Issue date Jun 8, 2010
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrifying apparatus, a processing unit, and an image formation a...
- Patent number 7,725,054
- Issue date May 25, 2010
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Charging device for charging a surface of a latent image bearing me...
- Patent number 7,693,459
- Issue date Apr 6, 2010
- Ricoh Company Limited
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process unit and image forming apparatus including the same
- Patent number 7,684,732
- Issue date Mar 23, 2010
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Cleaning of a charging member in an image forming apparatus
- Patent number 7,664,433
- Issue date Feb 16, 2010
- Ricoh Company, Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus that effectively charges a latent image car...
- Patent number 7,627,270
- Issue date Dec 1, 2009
- Ricoh Co., Ltd.
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Charging unit, process unit including the same, and image forming a...
- Patent number 7,539,442
- Issue date May 26, 2009
- Ricoh Company, Ltd.
- Yuji Nagatomo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
ELECTRONIC DEVICE
- Publication number 20230116586
- Publication date Apr 13, 2023
- Tetsumaru FUJITA
- G01 - MEASURING TESTING
Information Patent Application
LIGHT DEFLECTOR, DISTANCE MEASURING DEVICE, PROJECTION DEVICE, AND...
- Publication number 20210396994
- Publication date Dec 23, 2021
- RICOH COMPANY, LTD.
- Tetsumaru Fujita
- G01 - MEASURING TESTING
Information Patent Application
DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS UNIT IN...
- Publication number 20170176886
- Publication date Jun 22, 2017
- RICOH COMPANY, LTD.
- Yuji NAGATOMO
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME
- Publication number 20170146925
- Publication date May 25, 2017
- Masato TSUJI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
TONER CONTAINER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS
- Publication number 20150063865
- Publication date Mar 5, 2015
- Yuusuke FURUICHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING DEVICE AND PROCESS UNIT AND IMAGE FORMING APPARATUS INCO...
- Publication number 20140270861
- Publication date Sep 18, 2014
- Tetsumaru FUJITA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
SEALING ASSEMBLY, DEVELOPING DEVICE, PROCESS UNIT, AND IMAGE FORMIN...
- Publication number 20140153958
- Publication date Jun 5, 2014
- Yasunobu OGATA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPMENT DEVICE, PROCESSING UNIT AND IMAGE FORMING APPARATUS
- Publication number 20120033997
- Publication date Feb 9, 2012
- Tetsumaru FUJITA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND TONER SUPPLY METHOD
- Publication number 20110217055
- Publication date Sep 8, 2011
- Atsushi Takehara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND TONER SUPPLY METHOD
- Publication number 20110194864
- Publication date Aug 11, 2011
- Naoki Nakatake
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING UNIT, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE
- Publication number 20110188896
- Publication date Aug 4, 2011
- Kohta SAKAYA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20110064473
- Publication date Mar 17, 2011
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
SEMICONDUCTIVE MEMBER, AND DEVELOPING ROLL, CHARGING ROLL, TRANSFER...
- Publication number 20100150609
- Publication date Jun 17, 2010
- Chiyoshi Nozaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND DEVELOPING DEVICE
- Publication number 20090067887
- Publication date Mar 12, 2009
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS USING THE SAME
- Publication number 20090041491
- Publication date Feb 12, 2009
- Hidekazu SHONO
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS INCLUDING SAME
- Publication number 20090028606
- Publication date Jan 29, 2009
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080273898
- Publication date Nov 6, 2008
- Yoshio SAKAGAWA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080232875
- Publication date Sep 25, 2008
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING METHOD AND PROCESS CARTRIDGE
- Publication number 20080227001
- Publication date Sep 18, 2008
- Takuya KADOTA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080187360
- Publication date Aug 7, 2008
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING METHOD AND APPARATUS
- Publication number 20080187361
- Publication date Aug 7, 2008
- Yoshio Sakagawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080181655
- Publication date Jul 31, 2008
- Yoshio SAKAGAWA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20080181654
- Publication date Jul 31, 2008
- Yoshio SAKAGAWA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTRIFYING APPARATUS, A PROCESSING UNIT, AND AN IMAGE FORMATION A...
- Publication number 20080152384
- Publication date Jun 26, 2008
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
PROCESS UNIT AND IMAGE FORMING APPARATUS INCLUDING THE SAME
- Publication number 20080152385
- Publication date Jun 26, 2008
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
CLEANERLESS IMAGE FORMING APPARATUS
- Publication number 20080145100
- Publication date Jun 19, 2008
- Yoshio SAKAGAWA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
CHARGING DEVICE AND IMAGE FORMING APPARATUS USING THE CHARGING DEVICE
- Publication number 20080069592
- Publication date Mar 20, 2008
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING METHOD AND APPARATUS FOR EFFECTIVELY CHARGING AN IMAG...
- Publication number 20080056745
- Publication date Mar 6, 2008
- Tetsumaru Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
METHOD AND APPARATUS FOR IMAGE FORMING FOR EFFECTIVELY CHARGING AN...
- Publication number 20080038017
- Publication date Feb 14, 2008
- Tetsumaru FUJITA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
CHARGING UNIT, PROCESS UNIT INCLUDING THE SAME, AND IMAGE FORMING A...
- Publication number 20070280735
- Publication date Dec 6, 2007
- Yuji Nagatomo
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Tetsumaru Fujita

Person

Patents Grantslast 30 patents

Light deflector, distance measuring device, projection device, and...

Electronic device

Developing device, and image forming apparatus and process unit inc...

Developing device and image forming apparatus incorporating same

Toner container, process cartridge, and image forming apparatus

Sealing assembly, developing device, process unit, and image formin...

Developing device and process unit and image forming apparatus inco...

Development device, processing unit and image forming apparatus

Image forming apparatus and toner supply method

Developing unit, image forming apparatus, and process cartridge

Image forming apparatus and toner supply method

Image forming apparatus which mixes new unused toner with used old...

Image forming apparatus, image forming method, and developing device

Semiconductive member, and developing roll, charging roll, transfer...

Process cartridge and image forming apparatus including a toner cha...

Image forming apparatus

Image forming apparatus

Image forming apparatus

Process cartridge and image forming apparatus including same

Image forming method and apparatus which uses alternating voltage t...

Image forming apparatus including a brush member to temporarily cap...

Cleanerless image forming apparatus

Image forming method and apparatus for effectively charging an imag...

Image forming apparatus and process cartridge employing the same ha...

Electrifying apparatus, a processing unit, and an image formation a...

Charging device for charging a surface of a latent image bearing me...

Process unit and image forming apparatus including the same

Cleaning of a charging member in an image forming apparatus

Image forming apparatus that effectively charges a latent image car...

Charging unit, process unit including the same, and image forming a...

Patents Applicationslast 30 patents

ELECTRONIC DEVICE

LIGHT DEFLECTOR, DISTANCE MEASURING DEVICE, PROJECTION DEVICE, AND...

DEVELOPING DEVICE, AND IMAGE FORMING APPARATUS AND PROCESS UNIT IN...

DEVELOPING DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME

TONER CONTAINER, PROCESS CARTRIDGE, AND IMAGE FORMING APPARATUS

DEVELOPING DEVICE AND PROCESS UNIT AND IMAGE FORMING APPARATUS INCO...

SEALING ASSEMBLY, DEVELOPING DEVICE, PROCESS UNIT, AND IMAGE FORMIN...

DEVELOPMENT DEVICE, PROCESSING UNIT AND IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS AND TONER SUPPLY METHOD

IMAGE FORMING APPARATUS AND TONER SUPPLY METHOD

DEVELOPING UNIT, IMAGE FORMING APPARATUS, AND PROCESS CARTRIDGE

IMAGE FORMING APPARATUS

SEMICONDUCTIVE MEMBER, AND DEVELOPING ROLL, CHARGING ROLL, TRANSFER...

IMAGE FORMING APPARATUS, IMAGE FORMING METHOD, AND DEVELOPING DEVICE

PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS USING THE SAME

PROCESS CARTRIDGE AND IMAGE FORMING APPARATUS INCLUDING SAME

IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS

IMAGE FORMING METHOD AND PROCESS CARTRIDGE

IMAGE FORMING APPARATUS

IMAGE FORMING METHOD AND APPARATUS

IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS

ELECTRIFYING APPARATUS, A PROCESSING UNIT, AND AN IMAGE FORMATION A...

PROCESS UNIT AND IMAGE FORMING APPARATUS INCLUDING THE SAME

CLEANERLESS IMAGE FORMING APPARATUS

CHARGING DEVICE AND IMAGE FORMING APPARATUS USING THE CHARGING DEVICE

IMAGE FORMING METHOD AND APPARATUS FOR EFFECTIVELY CHARGING AN IMAG...

METHOD AND APPARATUS FOR IMAGE FORMING FOR EFFECTIVELY CHARGING AN...

CHARGING UNIT, PROCESS UNIT INCLUDING THE SAME, AND IMAGE FORMING A...