LexDanaLexDanabeta
Inventor

Yutaka Koizumi

Inventor
Yokohama, JP

Overview

121→
Patents
1976–2021
Patent span
Performing operations
Primary field (CPC B)

Patents· 121 as inventor

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

B41Jprimary
B41JTypewriters47%
G03GElectrography17%
Y10TTechnical subjects covered by former us classification6%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
LOC183%
H02KDynamo-electric machines2%
H05KPrinted circuits2%
B23KSoldering or unsoldering1%
G05BControl or regulating systems in general1%
PatentTitleYear
11,111,213Method for producing methionine20218,783,824'Capping unit for ink jet recording unit'20148,511,808'Liquid-ejecting recording head and liquid-ejecting recording apparatus'20138,152,267'Ink jet recording apparatus'20127,784,908'Flexible film wiring board and liquid discharge head'2010D0548780'Ink tank for printer'2007D0542345'Ink tank for printer'20077,070,267'Liquid jet recording head and liquid jet recording apparatus'20067,044,588'Ink jet head storing structure and liquid filling method'20066,975,466'Liquid discharge recording head, liquid discharge recording apparatus, and method for manufacturing liquid discharge head'20056,957,883'Liquid discharge recording head'20056,945,643'Ink jet head storing structure and liquid filling method'20056,913,351'Liquid jet recording head and recording apparatus'20056,880,925'Liquid discharge recording head, liquid discharge recording apparatus, and method for producing stopper member for liquid discharge recording head'2005RE038710'Laser process for making a filter for an ink jet'20056,851,795'Cartridge with opposed electrical and ink connection portions, and carriage and ink jet recording apparatus for same'20056,824,243'Liquid jet print head and liquid jet printing apparatus'20046,808,252'Ink jet recording head and manufacturing method therefor'20046,808,256'Sealing member, connecting structure using sealing member, and liquid discharge recording head'20046,805,437'Liquid supply system, ink jet recording head, ink jet recording apparatus and liquid filling method'20046,752,489'Liquid ejection head and method of manufacturing the liquid ejection head'2004D0491221'Ink cartridge for printer'2004D0490102'Ink cartridge for printer'20046,733,117'Pressure adjustment chamber, ink-jet recording head having the same, and ink-jet recording device using the same'20046,726,315'Liquid supplying device and liquid discharge recording apparatus'20046,715,865'Liquid jet recording head packing method, liquid jet recording head and liquid jet recording apparatus'20046,705,691'Ink-jet printing method and ink-jet printer'20046,659,595'Liquid jet recording head'20036,652,062'LIQUID DISCHARGE RECORDING HEAD WITH ORIFICE PLATE HAVING EXTENDED PORTION FIXED TO RECORDING HEAD MAIN BODY, LIQUID DISCHARGE RECORDING APPARATUS HAVING SUCH HEAD, AND METHOD FOR MANUFACTURING SUCH HEAD'20036,631,982'Liquid ejecting apparatus'20036,626,514'Liquid discharge recording head, method of manufacture therefor, and liquid discharge recording apparatus'20036,603,562'Two-dimensional positioning apparatus and method for measuring laser light from the apparatus'20036,582,069'Ink-jet recording head and recording apparatus'20036,530,641'Liquid discharge head unit, head cartridge, and method for manufacturing liquid discharge head unit'20036,499,828'Manufacturing method of ink jet head, ink jet head manufactured by same and ink jet device having ink jet head'20026,488,365'Liquid discharging head'20026,431,681'Recording apparatus, liquid container cartridge and liquid container'20026,409,300'Printing head, printing method and apparatus using same, and apparatus and method for correcting said printing head'20026,406,137'Ink-jet print head and production method of ink-jet print head'20026,331,051'Ink jet recording head and a method of manufacture therefor'20016,328,429'Ink jet recording head and ink jet recording apparatus'20016,325,482'Method and apparatus for correcting printhead, printhead corrected by this apparatus, and printing apparatus using this printhead'20016,168,254'Ink jet recording apparatus'20016,132,036'Ink tank, production process of ink tank and ink-jet printing apparatus'20006,116,714'Printing head, printing method and apparatus using same, and apparatus and method for correcting said printing head'20006,062,666'Ink jet recording method and apparatus beginning driving cycle with discharge elements other than at ends of substrates'20006,040,002'Etching resist composition, pattern forming method making use of the same, printed-wiring board and its production'20006,000,792'Ink jet apparatus provided with an improved recovery mechanism'19995,997,122'Ink jet recording apparatus capable of performing liquid droplet diameter random variable recording and ink jet recording method using ink for liquid droplet random variable recording'19995,953,031'Ink tank with ink container and waste ink container'19995,940,957'Laser process for making a filter for an ink jet'19995,933,163'Ink jet recording apparatus'19995,870,113'Liquid jet recording apparatus and method useable with removable recording head'19995,867,200'Print head, and print pre-heat method and apparatus using the same'1999D0400573'Ink cartridge for printer'19985,826,333'Method of manufacturing an ink jet head'19985,798,780'Recording element driving unit having extra driving element to facilitate assembly and apparatus using same'19985,774,151'Liquid ejecting head, liquid ejecting apparatus and method of producing said liquid ejecting head'19985,748,213'Ink jet head having plural elemental substrates, apparatus having the ink jet head, and method for manufacturing the ink jet head'19985,745,129'Ink jet head, ink jet apparatus and driving method therefor'19985,742,136'Linear motor drive system'19985,738,916'Ultraviolet-curing composition, pattern forming method making use of the same, printed-wiring board and its production'1998D0390259'Ink cartridge for printer'19985,682,190'Ink jet head and apparatus having an air chamber for improving performance'19975,659,343'Method of forming an ink jet recording head having an orifice plate with positioning openings for precisely locating discharge ports in a recording apparatus'19975,646,659'Ink jet recording apparatus, and method with control of ink drops and ink mist'19975,608,435'Method for producing ink jet head having a plated bump-shaped electrode'19975,594,350'Signal detecting circuit for digital controller'1997D0375975'Printing head'19965,561,448'Ink jet recording apparatus for recovering recording head'19965,559,536'Recovery device having a protruding portion providing reduced pressure for improved recovery and method using same'19965,457,485'Ink jet recording apparatus'19955,442,374'Color display'19955,357,268'Ink jet recording head in which the ejection elements are driven in blocks'19945,343,227'Ink jet recording apparatus and ink jet recording head with means reducing the amount of warp'19945,291,215'Ink jet recording apparatus with a thermally stable ink jet recording head'19945,243,363'Ink-jet recording head having bump-shaped electrode and protective layer providing structural support'19935,235,351'Liquid ejection recording head including a symbol indicating information used for changing the operation of the head'19935,231,424'Ink jet recording apparatus with efficient circulation recovery'19935,221,936'Ink tank having a vent path opened and closed by a movable magnetic member'19935,173,717'Ink jet recording head in which the ejection elements are driven in blocks'19925,164,747'Ink jet head with testing resistors'19925,132,733'Image forming apparatus having a plurality of developing unit'1992RE033844'Transfer medium separation in a recording apparatus'19925,075,697'Dual polarization transmission system'19915,006,867'Recording head for an ink jet recording apparatus having a plurality of temperature detection elements'19914,987,428'Color image forming apparatus'19914,947,191'Ink jet recording apparatus'19904,933,727'Color recording apparatus'19904,908,636'Recovery device having a protruding portion providing reduced pressure for improved recovery and method using same'19904,896,172'Liquid injection recording apparatus including recording liquid circulation control'19904,843,292'Direct drive motor system'19894,772,253'Endless belt'19884,751,549'Color copying machine'19884,746,950'Color copier'19884,742,371'Optical system for color copier'19884,690,542'Color copying apparatus'19874,675,619'Multiple quadrature-phase amplitude modulating system capable of reducing a peak amplitude'19874,664,501'Method of and apparatus for producing duplicates in color'19874,662,739'Method of controlling copying machine operation'19874,610,529'Apparatus for recording color images'19864,592,644'Copying machine using a photosensitive belt'19864,571,057'Transfer medium separation in a recording apparatus'19864,539,569'Ink jet recording apparatus'19854,505,577'Toner powder collection device'19854,487,501'Process of exposing photosensitive member'19844,348,098'Electrophotographic apparatus'19824,338,386'Multiple reproduction process and apparatus involves toned electrophotographic image transfer'19824,333,063'Amplitude equalizer'19824,319,832'Toner separation and recovery apparatus'19824,272,180'Electrostatic copying machine'19814,264,067'Duplexing auto document feed for copying machine'19814,231,561'Auto document feeder for use with duplex copying machine'19804,218,128'Duplex copying machine'19804,218,130'Method for controlling a copying apparatus adapted to print images on opposite surfaces of a copy sheet'19804,187,024'Electrostatic copying machine'19804,173,410'Method of duplex copying'19794,136,943'Visual display apparatus'19794,118,117'Electrophotographic optical scanning system'19784,050,812'Light shield curtain assembly for reciprocating optical scanning head'19773,998,497'Guide rod apparatus'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1995Patents assigned to RICOH KK (28)· patent assignee history
1976–2003Based in Tokyo, JP· patent location history
1979–2014Patents assigned to KOIZUMI YUTAKA (4)· patent assignee history
1979–1988Based in Kawasaki, JP· patent location history
1984–2006Based in Kanagawa, JP· patent location history
1985–2014Patents assigned to CANON KK (82)· patent assignee history
1985–1999Based in Hiratsuka, JP· patent location history
1987–1991Patents assigned to NEC CORP (2)· patent assignee history
1988–2014Based in Yokohama, JP· patent location history
1989–2003Patents assigned to YOKOGAWA ELECTRIC CORP (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CANON KK821985–2014
RICOH KK281976–1995
KOIZUMI YUTAKAself41979–2014
YOKOGAWA ELECTRIC CORP31989–2003
NEC CORP21987–1991
Locations
LocationPatentsSpan
Yokohama, JP501988–2014
Tokyo, JP291976–2003
Kanagawa, JP221984–2006
Kawasaki, JP151979–1988
Hiratsuka, JP31985–1999