Takuma Yasuo

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Development device and image forming apparatus incorporating same
- Patent number 9,031,471
- Issue date May 12, 2015
- Ricoh Company, Ltd.
- Tomoya Ohmura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and image forming apparatus
- Patent number 8,688,012
- Issue date Apr 1, 2014
- Ricoh Company, Ltd.
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development device and image forming apparatus incorporating same
- Patent number 8,682,187
- Issue date Mar 25, 2014
- Ricoh Company, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and image forming apparatus
- Patent number 8,666,288
- Issue date Mar 4, 2014
- Ricoh Company, Limited
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development device and image forming apparatus
- Patent number 8,639,150
- Issue date Jan 28, 2014
- Ricoh Company Limited
- Tomoya Ohmura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development device and image forming apparatus incorporating same
- Patent number 8,615,186
- Issue date Dec 24, 2013
- Ricoh Company, Ltd.
- Hiroshi Kikuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and image forming apparatus
- Patent number 8,515,316
- Issue date Aug 20, 2013
- Ricoh Company, Ltd.
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,962,055
- Issue date Jun 14, 2011
- Ricoh Company, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Multicolor image forming apparatus
- Patent number 7,796,905
- Issue date Sep 14, 2010
- Ricoh Company, Ltd.
- Haruyuki Honda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image-forming device comprising a contact charging unit
- Patent number 7,493,063
- Issue date Feb 17, 2009
- Ricoh Company, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus including static pre-eliminator
- Patent number 7,463,849
- Issue date Dec 9, 2008
- Ricoh Printing Systems, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with toner concentration controller
- Patent number 7,158,731
- Issue date Jan 2, 2007
- Ricoh Printing Systems, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,142,794
- Issue date Nov 28, 2006
- Ricoh Printing Systems, Ltd.
- Masanari Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming electrophotography apparatus and magnetic developing...
- Patent number 6,487,384
- Issue date Nov 26, 2002
- Hitachi Koki Co., Ltd.
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing system having a plurality of developing rollers with opp...
- Patent number 6,330,414
- Issue date Dec 11, 2001
- Hitachi Koki Co., Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic apparatus
- Patent number 5,923,933
- Issue date Jul 13, 1999
- Hitachi Koki Co., Ltd.
- Masayasu Anzai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device
- Patent number 5,907,755
- Issue date May 25, 1999
- Hitachi Koki Co., Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus employing residual toner recovery scheme
- Patent number 5,701,570
- Issue date Dec 23, 1997
- Hitachi, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming method and apparatus using energy beam impingement on...
- Patent number 5,666,598
- Issue date Sep 9, 1997
- Hitachi, Ltd.
- Tatsuya Sugita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Bias cleaning system and electrostatic printing apparatus therewith...
- Patent number 5,600,405
- Issue date Feb 4, 1997
- Hitachi, Ltd.
- Takao Umeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus for an electrophotographic machine
- Patent number 5,574,546
- Issue date Nov 12, 1996
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic recording apparatus with electrified cap and managing...
- Patent number 5,559,578
- Issue date Sep 24, 1996
- Hitachi, Ltd.
- Takao Umeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Belt type transfer device for electrophotographic apparatus
- Patent number 5,499,086
- Issue date Mar 12, 1996
- Hitachi, Ltd.
- Junichi Matsuno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Recording apparatus for printing both faces of a recording medium u...
- Patent number 5,459,562
- Issue date Oct 17, 1995
- Hitachi, Ltd.
- Teruaki Mitsuya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic recording apparatus and managing system thereof
- Patent number 5,373,351
- Issue date Dec 13, 1994
- Hitachi, Ltd.
- Takao Umeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation apparatus having tuck prevention control means
- Patent number 5,291,228
- Issue date Mar 1, 1994
- Hitachi, Ltd.
- Nagata Tetsuya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Corona deterioration and moisture compensation for transfer unit in...
- Patent number 5,291,253
- Issue date Mar 1, 1994
- Hitachi, Ltd.
- Takao Kumasaka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME
- Publication number 20120230733
- Publication date Sep 13, 2012
- Hiroshi KIKUCHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing Device And Image Forming Apparatus
- Publication number 20120114349
- Publication date May 10, 2012
- RICOH COMPANY, LTD.
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Development device and image forming apparatus incorporating same
- Publication number 20120057890
- Publication date Mar 8, 2012
- RICOH COMPANY, LTD.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing device and image forming apparatus
- Publication number 20120051792
- Publication date Mar 1, 2012
- RICOH COMPANY, LIMITED
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Development device and image forming apparatus incorporating same
- Publication number 20120051791
- Publication date Mar 1, 2012
- RICOH COMPANY, LTD.
- Tomoya Ohmura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPING DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20110229207
- Publication date Sep 22, 2011
- Junichi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20110182610
- Publication date Jul 28, 2011
- Tomoya OHMURA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20070286633
- Publication date Dec 13, 2007
- RICOH PRINTING SYSTEMS, LTD.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Multicolor image forming apparatus
- Publication number 20070031167
- Publication date Feb 8, 2007
- Ricoh Printing Systems, Ltd.
- Haruyuki Honda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image-Forming Device
- Publication number 20070025772
- Publication date Feb 1, 2007
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20060165438
- Publication date Jul 27, 2006
- Ricoh Printing Systems, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20050169661
- Publication date Aug 4, 2005
- Masanari Fujita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20050053386
- Publication date Mar 10, 2005
- Hitachi Printing Solutions, Ltd.
- Yasuo Takuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus and developing unit used therein
- Publication number 20020057930
- Publication date May 16, 2002
- Hisao Okada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Takuma Yasuo

Person

Patents Grantslast 30 patents

Development device and image forming apparatus incorporating same

Developing device and image forming apparatus

Development device and image forming apparatus incorporating same

Developing device and image forming apparatus

Development device and image forming apparatus

Development device and image forming apparatus incorporating same

Developing device and image forming apparatus

Image forming apparatus

Multicolor image forming apparatus

Image-forming device comprising a contact charging unit

Image forming apparatus including static pre-eliminator

Image forming apparatus with toner concentration controller

Image forming apparatus

Image forming electrophotography apparatus and magnetic developing...

Developing system having a plurality of developing rollers with opp...

Electrophotographic apparatus

Developing device

Image forming apparatus employing residual toner recovery scheme

Image forming method and apparatus using energy beam impingement on...

Bias cleaning system and electrostatic printing apparatus therewith...

Developing apparatus for an electrophotographic machine

Electrostatic recording apparatus with electrified cap and managing...

Belt type transfer device for electrophotographic apparatus

Recording apparatus for printing both faces of a recording medium u...

Electrostatic recording apparatus and managing system thereof

Image formation apparatus having tuck prevention control means

Corona deterioration and moisture compensation for transfer unit in...

Patents Applicationslast 30 patents

DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS INCORPORATING SAME

Developing Device And Image Forming Apparatus

Development device and image forming apparatus incorporating same

Developing device and image forming apparatus

Development device and image forming apparatus incorporating same

DEVELOPING DEVICE AND IMAGE FORMING APPARATUS

DEVELOPMENT DEVICE AND IMAGE FORMING APPARATUS

Image forming apparatus

Multicolor image forming apparatus

Image-Forming Device

Image forming apparatus

Image forming apparatus

Image forming apparatus

Image forming apparatus and developing unit used therein