Takeshi Yamakawa

Person

Kanagawa, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Casing structure, optical scanner, and image forming apparatus
- Patent number 12,088,765
- Issue date Sep 10, 2024
- Ricoh Company, Ltd.
- Yoshinobu Sakaue
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Housing, optical scanner, and image forming apparatus
- Patent number 11,800,027
- Issue date Oct 24, 2023
- Ricoh Company, Ltd.
- Susumu Narita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical scanning device and image forming apparatus
- Patent number 11,747,610
- Issue date Sep 5, 2023
- Ricoh Company, Ltd.
- Yoshinobu Sakaue
- G02 - OPTICS
Information Patent Grant
Image forming apparatus including a rotatable exposure device
- Patent number 10,082,761
- Issue date Sep 25, 2018
- Ricoh Company, Ltd.
- Susumu Narita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Housing structure, optical scanning device, and image forming appar...
- Patent number 9,519,259
- Issue date Dec 13, 2016
- Ricoh Company, Ltd.
- Daisuke Yoshida
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical writing device and image forming apparatus
- Patent number 9,030,519
- Issue date May 12, 2015
- Ricoh Company, Ltd.
- Susumu Narita
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical scanner and image forming apparatus including same
- Patent number 8,780,159
- Issue date Jul 15, 2014
- Ricoh Company, Ltd.
- Keiichi Serizawa
- G02 - OPTICS
Information Patent Grant
Optical scanner and image forming apparatus including same
- Patent number 8,754,918
- Issue date Jun 17, 2014
- Ricoh Company, Ltd.
- Hiroshi Johno
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming apparatus and optical scanning unit
- Patent number 8,675,035
- Issue date Mar 18, 2014
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical scanner and image forming apparatus including same
- Patent number 8,610,753
- Issue date Dec 17, 2013
- Ricoh Company, Ltd.
- Keiichi Serizawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Curve correction mechanism, optical scanner, and image forming appa...
- Patent number 8,503,055
- Issue date Aug 6, 2013
- Ricoh Company, Ltd.
- Keiichi Serizawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical scanner and image forming apparatus including same
- Patent number 8,471,883
- Issue date Jun 25, 2013
- Ricoh Company, Ltd.
- Keiichi Serizawa
- G02 - OPTICS
Information Patent Grant
Optical scanning device and image forming apparatus
- Patent number 8,368,986
- Issue date Feb 5, 2013
- Ricoh Company, Ltd.
- Keiichi Serizawa
- G02 - OPTICS
Information Patent Grant
Image forming apparatus and optical scanning unit
- Patent number 8,339,435
- Issue date Dec 25, 2012
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Optical scanner and image forming apparatus incorporating same
- Patent number 8,330,786
- Issue date Dec 11, 2012
- Ricoh Company, Ltd.
- Kazunori Watanabe
- G02 - OPTICS
Information Patent Grant
Optical scanning device and image forming apparatus
- Patent number 8,184,352
- Issue date May 22, 2012
- Ricoh Company, Limited
- Hiroshi Johno
- G02 - OPTICS
Information Patent Grant
Optical scanning device including shutter member that closes or ope...
- Patent number 7,872,664
- Issue date Jan 18, 2011
- Ricoh Company, Limited
- Takeshi Yamakawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image processing apparatus having enhanced controlling process for...
- Patent number 7,869,101
- Issue date Jan 11, 2011
- Ricoh Company, Ltd.
- Katsunori Shoji
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming apparatus, optical writing device, and housing moldin...
- Patent number 7,760,225
- Issue date Jul 20, 2010
- Ricoh Company, Limited
- Hiroshi Yoshizawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical writing unit and an image forming apparatus including the same
- Patent number 7,667,726
- Issue date Feb 23, 2010
- Ricoh Co., Ltd.
- Katsunori Shoji
- G02 - OPTICS
Information Patent Grant
Optical scanning device, image forming apparatus, and method of red...
- Patent number 7,474,451
- Issue date Jan 6, 2009
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Grant
Optical writing device and image forming apparatus
- Patent number 7,440,001
- Issue date Oct 21, 2008
- Ricoh Company, Ltd.
- Rumiko Ono
- G02 - OPTICS
Information Patent Grant
Optical-scanning apparatus and image forming apparatus
- Patent number 7,414,239
- Issue date Aug 19, 2008
- Ricoh Company, Ltd.
- Katsunori Shoji
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Lens mounting device
- Patent number 6,985,312
- Issue date Jan 10, 2006
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Grant
Image forming apparatus
- Patent number 6,829,001
- Issue date Dec 7, 2004
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Grant
Image forming apparatus in which adjustment for forming image in re...
- Patent number 6,243,128
- Issue date Jun 5, 2001
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming apparatus and method to correct magnification error c...
- Patent number 6,236,418
- Issue date May 22, 2001
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming method and apparatus with multi-beam light source cap...
- Patent number 6,072,516
- Issue date Jun 6, 2000
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Image forming device having convenient access to serviceable compon...
- Patent number 5,803,622
- Issue date Sep 8, 1998
- Ricoh Company, Ltd.
- Takashi Mama
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Image forming apparatus with frequency corrector
- Patent number 5,610,651
- Issue date Mar 11, 1997
- Ricoh Company, Ltd.
- Takeshi Yamakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CASING STRUCTURE, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS
- Publication number 20230308566
- Publication date Sep 28, 2023
- Yoshinobu SAKAUE
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
HOUSING, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS
- Publication number 20220294926
- Publication date Sep 15, 2022
- RICOH COMPANY, LTD.
- Susumu Narita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20210318536
- Publication date Oct 14, 2021
- RICOH COMPANY, LTD.
- Yoshinobu SAKAUE
- G02 - OPTICS
Information Patent Application
IMAGE FORMING APPARATUS
- Publication number 20170371292
- Publication date Dec 28, 2017
- RICOH COMPANY, LTD.
- Susumu NARITA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
HOUSING STRUCTURE, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPAR...
- Publication number 20160231690
- Publication date Aug 11, 2016
- RICOH COMPANY, LTD.
- Daisuke Yoshida
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS
- Publication number 20140354757
- Publication date Dec 4, 2014
- RICOH COMPANY, LTD.
- Susumu NARITA
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME
- Publication number 20130251407
- Publication date Sep 26, 2013
- RICOH COMPANY, LTD.
- Keiichi SERIZAWA
- G02 - OPTICS
Information Patent Application
Image Forming Apparatus And Optical Scanning Unit
- Publication number 20130070042
- Publication date Mar 21, 2013
- Takeshi YAMAKAWA
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Optical scanner and image forming apparatus including same
- Publication number 20120062685
- Publication date Mar 15, 2012
- RICOH COMPANY, LTD.
- Keiichi Serizawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME
- Publication number 20110316958
- Publication date Dec 29, 2011
- RICOH COMPANY, LTD.
- HIROSHI JOHNO
- G02 - OPTICS
Information Patent Application
CURVE CORRECTION MECHANISM, OPTICAL SCANNER, AND IMAGE FORMING APPA...
- Publication number 20110310455
- Publication date Dec 22, 2011
- Keiichi Serizawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Optical scanning device and image forming apparatus
- Publication number 20110199663
- Publication date Aug 18, 2011
- RICOH COMPANY, LIMITED
- Hiroshi Johno
- G02 - OPTICS
Information Patent Application
Optical scanning device and image forming apparatus
- Publication number 20110199664
- Publication date Aug 18, 2011
- RICOH COMPANY, LIMITED
- Keiichi Serizawa
- G02 - OPTICS
Information Patent Application
OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME
- Publication number 20100033787
- Publication date Feb 11, 2010
- RICOH COMPANY, LTD.
- Keiichi SERIZAWA
- G02 - OPTICS
Information Patent Application
Optical scanner and image forming apparatus incorporating same
- Publication number 20090295899
- Publication date Dec 3, 2009
- Ricoh Company, Ltd.
- Kazunori Watanabe
- G02 - OPTICS
Information Patent Application
Optical-scanning apparatus and image forming apparatus
- Publication number 20070252077
- Publication date Nov 1, 2007
- Ricoh Company, Ltd.
- Katsunori Shoji
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Image forming apparatus, optical writing device, and housing moldin...
- Publication number 20070165099
- Publication date Jul 19, 2007
- Hiroshi Yoshizawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Optical writing unit and an image forming apparatus including the same
- Publication number 20070139745
- Publication date Jun 21, 2007
- Katsunori Shoji
- G02 - OPTICS
Information Patent Application
Image processing apparatus having enhanced controlling process for...
- Publication number 20070134023
- Publication date Jun 14, 2007
- Katsunori Shoji
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Image forming apparatus and optical scanning unit
- Publication number 20070122192
- Publication date May 31, 2007
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Application
Optical scanning device and image forming apparatus
- Publication number 20070070173
- Publication date Mar 29, 2007
- Ricoh Company, Limited
- Takeshi Yamakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical scanning device, image forming apparatus, and method of red...
- Publication number 20060209376
- Publication date Sep 21, 2006
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Application
Optical writing device and image forming apparatus
- Publication number 20050012974
- Publication date Jan 20, 2005
- RICOH COMPANY, LTD.
- Rumiko Ono
- G02 - OPTICS
Information Patent Application
Lens mounting device
- Publication number 20040240083
- Publication date Dec 2, 2004
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Application
Image formation apparatus
- Publication number 20040105079
- Publication date Jun 3, 2004
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Application
Image forming apparatus
- Publication number 20030160860
- Publication date Aug 28, 2003
- Takeshi Yamakawa
- G02 - OPTICS
Information Patent Application
Image forming apparatus
- Publication number 20030091369
- Publication date May 15, 2003
- Takeshi Yamakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Takeshi Yamakawa

Person

Patents Grantslast 30 patents

Casing structure, optical scanner, and image forming apparatus

Housing, optical scanner, and image forming apparatus

Optical scanning device and image forming apparatus

Image forming apparatus including a rotatable exposure device

Housing structure, optical scanning device, and image forming appar...

Optical writing device and image forming apparatus

Optical scanner and image forming apparatus including same

Optical scanner and image forming apparatus including same

Image forming apparatus and optical scanning unit

Optical scanner and image forming apparatus including same

Curve correction mechanism, optical scanner, and image forming appa...

Optical scanner and image forming apparatus including same

Optical scanning device and image forming apparatus

Image forming apparatus and optical scanning unit

Optical scanner and image forming apparatus incorporating same

Optical scanning device and image forming apparatus

Optical scanning device including shutter member that closes or ope...

Image processing apparatus having enhanced controlling process for...

Image forming apparatus, optical writing device, and housing moldin...

Optical writing unit and an image forming apparatus including the same

Optical scanning device, image forming apparatus, and method of red...

Optical writing device and image forming apparatus

Optical-scanning apparatus and image forming apparatus

Lens mounting device

Image forming apparatus

Image forming apparatus in which adjustment for forming image in re...

Image forming apparatus and method to correct magnification error c...

Image forming method and apparatus with multi-beam light source cap...

Image forming device having convenient access to serviceable compon...

Image forming apparatus with frequency corrector

Patents Applicationslast 30 patents

CASING STRUCTURE, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS

HOUSING, OPTICAL SCANNER, AND IMAGE FORMING APPARATUS

OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS

IMAGE FORMING APPARATUS

HOUSING STRUCTURE, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPAR...

OPTICAL WRITING DEVICE AND IMAGE FORMING APPARATUS

OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME

Image Forming Apparatus And Optical Scanning Unit

Optical scanner and image forming apparatus including same

OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME

CURVE CORRECTION MECHANISM, OPTICAL SCANNER, AND IMAGE FORMING APPA...

Optical scanning device and image forming apparatus

Optical scanning device and image forming apparatus

OPTICAL SCANNER AND IMAGE FORMING APPARATUS INCLUDING SAME

Optical scanner and image forming apparatus incorporating same

Optical-scanning apparatus and image forming apparatus

Image forming apparatus, optical writing device, and housing moldin...

Optical writing unit and an image forming apparatus including the same

Image processing apparatus having enhanced controlling process for...

Image forming apparatus and optical scanning unit

Optical scanning device and image forming apparatus

Optical scanning device, image forming apparatus, and method of red...

Optical writing device and image forming apparatus

Lens mounting device

Image formation apparatus

Image forming apparatus

Image forming apparatus