Yushi Hirayama

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Toner supplying device and image forming apparatus using same
- Patent number 8,879,963
- Issue date Nov 4, 2014
- Ricoh Company, Limited
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Diffuse reflection output conversion method, attached powder amount...
- Patent number 8,867,937
- Issue date Oct 21, 2014
- Ricoh Company, Limited
- Hideo Muroi
- G01 - MEASURING TESTING
Information Patent Grant
Developing device and image forming apparatus
- Patent number 8,818,244
- Issue date Aug 26, 2014
- Ricoh Company, Ltd.
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus having a first and second toner containers...
- Patent number 8,311,422
- Issue date Nov 13, 2012
- Ricoh Company, Limited
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image-density control method
- Patent number 8,233,813
- Issue date Jul 31, 2012
- Ricoh Company, Limited
- Akira Yoshida
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 8,175,471
- Issue date May 8, 2012
- Ricoh Company, Ltd.
- Kentaroh Tomita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process cartridge including developing unit and incorporated in ima...
- Patent number 8,145,100
- Issue date Mar 27, 2012
- Ricoh Company, Ltd.
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and method of adjusting charge bias
- Patent number 8,103,181
- Issue date Jan 24, 2012
- Ricoh Company, Ltd.
- Hitoshi Ishibashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image quality correction method used th...
- Patent number 8,099,006
- Issue date Jan 17, 2012
- Ricoh Company Limited
- Kohta Fujimori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus capable of efficient toner concentration co...
- Patent number 8,095,025
- Issue date Jan 10, 2012
- Ricoh Company Limited
- Hitoshi Ishibashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 8,045,874
- Issue date Oct 25, 2011
- Ricoh Company Limited
- Akira Yoshida
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 8,027,605
- Issue date Sep 27, 2011
- Ricoh Company, Ltd.
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner replenishment determination device of an image forming apparatus
- Patent number 8,009,997
- Issue date Aug 30, 2011
- Ricoh Company, Ltd.
- Osamu Ariizumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 7,929,873
- Issue date Apr 19, 2011
- Ricoh Company Limited
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Reuse method and a reusable device for an image forming apparatus h...
- Patent number 7,903,986
- Issue date Mar 8, 2011
- Ricoh Company Limited
- Kayoko Tanaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus for correcting a toner density target value
- Patent number 7,885,556
- Issue date Feb 8, 2011
- Ricoh Company, Ltd.
- Kohta Fujimori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 7,881,629
- Issue date Feb 1, 2011
- Ricoh Company, Ltd.
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with a two component developer, toner densi...
- Patent number 7,809,291
- Issue date Oct 5, 2010
- Ricoh Company, Ltd.
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and method of adjusting charge bias
- Patent number 7,778,560
- Issue date Aug 17, 2010
- Ricoh Company, Ltd.
- Hitoshi Ishibashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with toner density control
- Patent number 7,747,182
- Issue date Jun 29, 2010
- Ricoh Company, Ltd.
- Shinji Kato
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing unit and image forming apparatus which forces consumptio...
- Patent number 7,672,602
- Issue date Mar 2, 2010
- Ricoh Company, Limited
- Osamu Ariizumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image forming method
- Patent number 7,668,471
- Issue date Feb 23, 2010
- Ricoh Company Limited
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image forming method
- Patent number 7,616,909
- Issue date Nov 10, 2009
- Ricoh Company, Ltd.
- Shinji Kato
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus including toner supply controlling unit
- Patent number 7,603,046
- Issue date Oct 13, 2009
- Ricoh Company, Ltd.
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device, and process unit and image forming apparatus usi...
- Patent number 7,551,862
- Issue date Jun 23, 2009
- Ricoh Company Limited
- Kayoko Tanaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus effectively conducting a process control
- Patent number 7,548,704
- Issue date Jun 16, 2009
- Ricoh Co., Ltd.
- Shin Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and image density control method
- Patent number 7,536,121
- Issue date May 19, 2009
- Ricoh Company, Limited
- Kiichirou Shimizu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and toner concentration controlling method
- Patent number 7,493,058
- Issue date Feb 17, 2009
- Ricoh Company, Ltd.
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image-information detecting device and image forming apparatus
- Patent number 7,260,335
- Issue date Aug 21, 2007
- Ricoh Company, Limited
- Shinji Kato
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method and apparatus for image forming capable of effectively detec...
- Patent number 7,251,420
- Issue date Jul 31, 2007
- Ricoh Company, Ltd.
- Kohta Fujimori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
IMAGE FORMING APPARATUS INCORPORATING CONTROLLER FOR DETERMINING EX...
- Publication number 20150234316
- Publication date Aug 20, 2015
- Hideaki Kanaya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20130004207
- Publication date Jan 3, 2013
- Yushi HIRAYAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DIFFUSE REFLECTION OUTPUT CONVERSION METHOD, ATTACHED POWDER AMOUNT...
- Publication number 20120315056
- Publication date Dec 13, 2012
- Hideo MUROI
- G01 - MEASURING TESTING
Information Patent Application
TONER SUPPLYING DEVICE AND IMAGE FORMING APPARATUS USING SAME
- Publication number 20110110689
- Publication date May 12, 2011
- Yushi HIRAYAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FOMRING APARATUS AND METHOD OF ADJUSTING CHARGE BIAS
- Publication number 20100278549
- Publication date Nov 4, 2010
- Hitoshi Ishibashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20100092188
- Publication date Apr 15, 2010
- Yushi HIRAYAMA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE-DENSITY CONTROL METHOD
- Publication number 20090324267
- Publication date Dec 31, 2009
- Akira YOSHIDA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
REUSE METHOD AND IMAGE FORMING APPARATUS
- Publication number 20090279907
- Publication date Nov 12, 2009
- Kayoko Tanaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE QUALITY CORRECTION METHOD USED TH...
- Publication number 20090263150
- Publication date Oct 22, 2009
- Kohta Fujimori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- Publication number 20090202263
- Publication date Aug 13, 2009
- Akira YOSHIDA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
PROCESS CARTRIDGE INCLUDING DEVELOPING UNIT AND INCORPORATED IN IMA...
- Publication number 20090190960
- Publication date Jul 30, 2009
- Yushi Hirayama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- Publication number 20090110413
- Publication date Apr 30, 2009
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS CAPABLE OF EFFICIENT TONER CONCENTRATION CO...
- Publication number 20080253793
- Publication date Oct 16, 2008
- Hitoshi ISHIBASHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- Publication number 20080205923
- Publication date Aug 28, 2008
- Nobutaka TAKEUCHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- Publication number 20080145078
- Publication date Jun 19, 2008
- Kentaroh TOMITA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- Publication number 20080124107
- Publication date May 29, 2008
- Nobutaka TAKEUCHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING CHARGE BIAS
- Publication number 20080031646
- Publication date Feb 7, 2008
- Hitoshi Ishibashi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
- Publication number 20080025742
- Publication date Jan 31, 2008
- Shinji Kato
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING DEVICE, AND PROCESS UNIT AND IMAGE FORMING APPARATUS USI...
- Publication number 20070286617
- Publication date Dec 13, 2007
- Kayoko Tanaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
- Publication number 20070269228
- Publication date Nov 22, 2007
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
IMAGE FORMING APPARATUS EFFECTIVELY CONDUCTING A PROCESS CONTROL
- Publication number 20070230979
- Publication date Oct 4, 2007
- Shin Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus and image density control method
- Publication number 20070122169
- Publication date May 31, 2007
- Ricoh Company, Limited
- Kiichirou Shimizu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing unit and image forming apparatus
- Publication number 20070104499
- Publication date May 10, 2007
- Osamu Ariizumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus and toner concentration controlling method
- Publication number 20070036566
- Publication date Feb 15, 2007
- Nobutaka Takeuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image-information detecting device and image forming apparatus
- Publication number 20060024076
- Publication date Feb 2, 2006
- Shinji Kato
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Method and apparatus for image forming capable of effectively detec...
- Publication number 20060002724
- Publication date Jan 5, 2006
- Kohta Fujimori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Method and apparatus for image forming capable of controlling image...
- Publication number 20050207766
- Publication date Sep 22, 2005
- RICOH COMPANY, LIMITED
- Shin Hasegawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Yushi Hirayama

Person

Patents Grantslast 30 patents

Toner supplying device and image forming apparatus using same

Diffuse reflection output conversion method, attached powder amount...

Developing device and image forming apparatus

Image forming apparatus having a first and second toner containers...

Image forming apparatus and image-density control method

Image forming apparatus and image density control method

Process cartridge including developing unit and incorporated in ima...

Image forming apparatus and method of adjusting charge bias

Image forming apparatus and image quality correction method used th...

Image forming apparatus capable of efficient toner concentration co...

Image forming apparatus and image density control method

Image forming apparatus and image density control method

Toner replenishment determination device of an image forming apparatus

Image forming apparatus and image density control method

Reuse method and a reusable device for an image forming apparatus h...

Image forming apparatus for correcting a toner density target value

Image forming apparatus and image density control method

Image forming apparatus with a two component developer, toner densi...

Image forming apparatus and method of adjusting charge bias

Image forming apparatus with toner density control

Developing unit and image forming apparatus which forces consumptio...

Image forming apparatus and image forming method

Image forming apparatus and image forming method

Image forming apparatus including toner supply controlling unit

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

Image forming apparatus effectively conducting a process control

Image forming apparatus and image density control method

Image forming apparatus and toner concentration controlling method

Image-information detecting device and image forming apparatus

Method and apparatus for image forming capable of effectively detec...

Patents Applicationslast 30 patents

IMAGE FORMING APPARATUS INCORPORATING CONTROLLER FOR DETERMINING EX...

DEVELOPING DEVICE AND IMAGE FORMING APPARATUS

DIFFUSE REFLECTION OUTPUT CONVERSION METHOD, ATTACHED POWDER AMOUNT...

TONER SUPPLYING DEVICE AND IMAGE FORMING APPARATUS USING SAME

IMAGE FOMRING APARATUS AND METHOD OF ADJUSTING CHARGE BIAS

IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS AND IMAGE-DENSITY CONTROL METHOD

REUSE METHOD AND IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS AND IMAGE QUALITY CORRECTION METHOD USED TH...

IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD

PROCESS CARTRIDGE INCLUDING DEVELOPING UNIT AND INCORPORATED IN IMA...

IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD

IMAGE FORMING APPARATUS CAPABLE OF EFFICIENT TONER CONCENTRATION CO...

IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD

IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD

IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD

IMAGE FORMING APPARATUS AND METHOD OF ADJUSTING CHARGE BIAS

IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD

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

IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD

IMAGE FORMING APPARATUS EFFECTIVELY CONDUCTING A PROCESS CONTROL

Image forming apparatus and image density control method

Developing unit and image forming apparatus

Image forming apparatus and toner concentration controlling method

Image-information detecting device and image forming apparatus

Method and apparatus for image forming capable of effectively detec...

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