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Inventor

Nobuyuki Yanagawa

Inventor
Kanagawa, JP

Overview

65→
Patents
1976–2010
Patent span
Physics
Primary field (CPC G)

Patents· 65 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G03Gprimary
G03GElectrography55%
H04NPictorial communication, e.g. television9%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them8%
B41JTypewriters7%
B41MPrinting, duplicating, marking, or copying processes7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
G06KGraphical data reading3%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables2%
B82YSpecific uses or applications of nanostructures1%
C09DCoating compositions, e.g. paints, varnishes or lacquers1%
PatentTitleYear
7,656,420'Controlling timing for starting image formation'20107,583,281'Image forming apparatus'20097,583,919'Color image forming apparatus capable of effectively matching registration between elementary color images'20097,542,702'Image forming apparatus having a simple cassette of image bearing photoconductors'20097,539,439'Image carrier toner unit and image forming apparatus'20097,502,041'Method and apparatus for image forming capable of synthesizing a full color image without causing deviations of color layers'20097,499,066'Image forming apparatus with improved capability of image superposition'20097,450,138'Controlling timing for starting image formation'20087,257,350'Cleaning unit with a light beam path for the passage of a light beam'20077,247,840'Image forming apparatus, and method of correcting timing for generating laser beams'20077,149,446'Belt apparatus used in image formation, and an image formation apparatus'20067,123,858'Two-station type color image forming apparatus with separately replaceable components'20067,082,274'Image forming apparatus with components removable in preselected direction and order'20067,070,269'Recording method and apparatus with an intermediate transfer medium based on transfer-type recording mechanism'20066,933,959'Optical scanning device and image forming apparatus'20056,919,911'Image forming apparatus'20056,920,291'Belt apparatus used in image formation, and an image formation apparatus'20056,891,554'Method and device for writing control and image forming device'20056,842,598'Image forming apparatus having a plurality of developing means around an image carrier'20056,837,578'Recording method and apparatus with an intermediate transfer medium based on transfer-type recording mechanism'20056,839,531'Belt apparatus used in image formation, and an image formation apparatus'20056,832,061'Image forming apparatus with selectively lockable intermediate members for supporting developing and forming devices of same'20046,718,151'Image formation apparatus and method of alternating developing units'20046,674,982'Image forming apparatus including components mounted and/or dismounted in selected order'20046,623,816'Recording method and apparatus with an intermediate transfer medium based on transfer-type recording mechanism'20036,439,713'Powder composition and process of forming liquid ink image using same'20026,402,317'Ink-jet recording of images with improved clarity of images'20026,396,528'Image forming system, intermediate transfer medium and method with temporary attachment features'20026,332,066'Multicolor image forming method and apparatus using an intermediate transfer belt and apparatus having plural developing units for the same'20016,292,641'Image forming apparatus selectively operating one of a plurality of developing units and a method for controlling a switching operation for the developing units'20016,263,178'Method of applying a bias voltage for image development and method of switching the bias voltage in an image forming apparatus'20016,257,716'Ink-jet recording of images with improved clarity of images'20016,256,461'Image forming apparatus with an intermediate transfer body including reference markers for controlling the same'20016,222,566'Image formation apparatus and method thereof'20016,215,974'Image forming apparatus with a toner mounter having a vibration apparatus'20016,157,797'Image forming apparatus with integrated rotatable image carrier and writing device and method of assembling the same'20004,921,236'Recycling automatic document feeder'19904,717,939'Slit-scanning type image exposing system'19884,615,607'Dual-color copier'19864,487,501'Process of exposing photosensitive member'19844,474,453'Electrostatic copying apparatus'19844,451,139'Cleaning apparatus for photoconductive element'19844,449,810'Electrophotographic copying machine with means for mixing and removing toner and an integral exposure plate'19844,406,535'Development apparatus'19834,403,851'Electrostatic copying machine comprising improved arrangement of operating units'19834,402,103'Cleaning unit for copying machine'19834,378,416'Photosensitive member for use in electrophotographic copying process'19834,372,547'Sheet feed apparatus'19834,365,888'Electrostatic copying apparatus'19824,364,656'Electrophotographic copying machine'19824,359,670'Lamp intensity control apparatus comprising preset means'19824,348,106'Guide apparatus for movable contact glass in electrophotographic copying machines'19824,261,560'Sheet separation apparatus'19814,204,668'Paper feeding apparatus'19804,190,349'Slider reciprocating driving apparatus for use with electrophotographic copying machine'19804,183,652'Photoconductor sheet clamp apparatus'19804,180,721'Method of controlling fixing temperature of powder image in electrophotographic copying machine'19794,178,093'Optomechanical scanning apparatus for copying machine'19794,171,899'Transfer apparatus'19794,161,644'Electrophotographic apparatus comprising improved thermal fixing means'19794,155,545'Sheet feed apparatus for electrostatic copying machine or the like'19794,128,334'Anchorage for a moving body'19784,074,217'Cleaning unit for an optical system in a copying machine'19784,061,330'Sheet separator for use in electrophotographic copying machines'19773,942,642'Card retrieval system'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2010Patents assigned to RICOH KK (64)· patent assignee history
1976–2007Based in Tokyo, JP· patent location history
1977–2009Based in Chigasaki, JP· patent location history
1983Based in Chigaski, JP· patent location history
1984–2009Based in Kanagawa, JP· patent location history
1988Patents assigned to YANAGAWA NOBUYUKI (1)· patent assignee history
2008–2010Based in Shizuoka, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RICOH KK641976–2010
YANAGAWA NOBUYUKIself11988
Locations
LocationPatentsSpan
Kanagawa, JP241984–2009
Chigasaki, JP211977–2009
Tokyo, JP151976–2007
Shizuoka, JP42008–2010
Chigaski, JP11983