Hiroshi Yoshizawa

Person

Yokohama, JP

People

Patents Grantslast 30 patents

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
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 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
Optical scanning device, image forming apparatus including the same...
- Patent number 7,868,288
- Issue date Jan 11, 2011
- Ricoh Company, Limited
- Hiroshi Yoshizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
Image forming method and apparatus capable of effectively performin...
- Patent number 7,606,505
- Issue date Oct 20, 2009
- Ricoh Company, Ltd.
- Hideo Kikuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 7,557,823
- Issue date Jul 7, 2009
- Ricoh Company, Ltd.
- Rumiko Ono
- G02 - OPTICS
Information Patent Grant
Scanning lens for optical scanner, optical scanner, and image formi...
- Patent number 7,535,594
- Issue date May 19, 2009
- Ricoh Company, Limited
- Hiroshi Yoshizawa
- 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-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
Developing device, process cartridge and image forming apparatus
- Patent number 7,366,431
- Issue date Apr 29, 2008
- Ricoh Company, Ltd.
- Yasuhisa Ehara
- 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
Apparatus and device unit for use in the apparatus
- Patent number 7,319,827
- Issue date Jan 15, 2008
- Ricoh Company Ltd.
- Hiroshi Yoshizawa
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
System, apparatus, and method for preventing access to information...
- Patent number 7,292,794
- Issue date Nov 6, 2007
- Ricoh Company Ltd.
- Hiroshi Yoshizawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical scanner and image forming apparatus using the same
- Patent number 7,149,021
- Issue date Dec 12, 2006
- Ricoh Company, Ltd.
- Hiroshi Yoshizawa
- G02 - OPTICS
Information Patent Grant
Optical scanning device and image forming apparatus using the same
- Patent number 7,057,780
- Issue date Jun 6, 2006
- Ricoh Company, Ltd.
- Hiroshi Yoshizawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Optical scanner and image forming apparatus using the same
- Patent number 6,813,052
- Issue date Nov 2, 2004
- Ricoh Company, Ltd.
- Hiroshi Yoshizawa
- G02 - OPTICS
Information Patent Grant
Attachable/detachable sheet sorting device and sheet discharging sy...
- Patent number 6,634,640
- Issue date Oct 21, 2003
- Ricoh Company, Ltd.
- Hiroshi Yoshizawa
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Optical writing system directed to miniaturization thereof, and ima...
- Patent number 6,593,951
- Issue date Jul 15, 2003
- Ricoh Company, Ltd.
- Masato Yokoyama
- G02 - OPTICS
Information Patent Grant
Magnetic recording and/or reproducing apparatus
- Patent number 5,218,492
- Issue date Jun 8, 1993
- Victor Company of Japan, Ltd.
- Ritsu Miyamoto
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

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 scanning device, enclosure of the same, method of configuri...
- Publication number 20070273947
- Publication date Nov 29, 2007
- Ricoh Company, Limited
- Hiroshi Yoshizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
Image forming apparatus
- Publication number 20070046766
- Publication date Mar 1, 2007
- Rumiko Ono
- G02 - OPTICS
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
Apparatus and device unit for use in the apparatus
- Publication number 20060169067
- Publication date Aug 3, 2006
- Hiroshi Yoshizawa
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Image forming method and apparatus capable of effectively performin...
- Publication number 20060165422
- Publication date Jul 27, 2006
- Hideo Kikuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Developing device, process cartridge and image forming apparatus
- Publication number 20060056865
- Publication date Mar 16, 2006
- Yasuhisa Ehara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
System, apparatus, and method for preventing access to information...
- Publication number 20050213997
- Publication date Sep 29, 2005
- Hiroshi Yoshizawa
- 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
Information Patent Application
Optical scanner and image forming apparatus using the same
- Publication number 20040246553
- Publication date Dec 9, 2004
- Hiroshi Yoshizawa
- G02 - OPTICS
Information Patent Application
Scanning lens for optical scanner, optical scanner, and image formi...
- Publication number 20040179087
- Publication date Sep 16, 2004
- Hiroshi Yoshizawa
- G02 - OPTICS
Information Patent Application
Optical scanner and image forming apparatus using the same
- Publication number 20040085605
- Publication date May 6, 2004
- Hiroshi Yoshizawa
- G02 - OPTICS
Information Patent Application
Optical scanning device and image forming apparatus uing the same
- Publication number 20030058513
- Publication date Mar 27, 2003
- Hiroshi Yoshizawa
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Optical writing system directed to miniaturization thereof, and ima...
- Publication number 20020036683
- Publication date Mar 28, 2002
- Masato Yokoyama
- G02 - OPTICS

Hiroshi Yoshizawa

Person

Patents Grantslast 30 patents

Image forming apparatus and optical scanning unit

Image forming apparatus and optical scanning unit

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

Optical scanning device, image forming apparatus including the same...

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

Image forming method and apparatus capable of effectively performin...

Image forming apparatus

Scanning lens for optical scanner, optical scanner, and image formi...

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

Optical-scanning apparatus and image forming apparatus

Developing device, process cartridge and image forming apparatus

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

Apparatus and device unit for use in the apparatus

System, apparatus, and method for preventing access to information...

Optical scanner and image forming apparatus using the same

Optical scanning device and image forming apparatus using the same

Optical scanner and image forming apparatus using the same

Attachable/detachable sheet sorting device and sheet discharging sy...

Optical writing system directed to miniaturization thereof, and ima...

Magnetic recording and/or reproducing apparatus

Patents Applicationslast 30 patents

Image Forming Apparatus And Optical Scanning Unit

Optical scanning device, enclosure of the same, method of configuri...

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

Image forming apparatus

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

Apparatus and device unit for use in the apparatus

Image forming method and apparatus capable of effectively performin...

Developing device, process cartridge and image forming apparatus

System, apparatus, and method for preventing access to information...

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

Optical scanner and image forming apparatus using the same

Scanning lens for optical scanner, optical scanner, and image formi...

Optical scanner and image forming apparatus using the same

Optical scanning device and image forming apparatus uing the same

Optical writing system directed to miniaturization thereof, and ima...