LexDanaLexDanabeta
Inventor

Koji Matsumoto

Inventor
Tokyo, JP

Overview

152→
Patents
1977–2021
Patent span
Physics
Primary field (CPC G)

Patents· 152 as inventor

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

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer15%
Y10TTechnical subjects covered by former us classification7%
G02BOptical elements, systems or apparatus6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
C08JWorking-up5%
C08FMacromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds3%
G06NComputing arrangements based on specific computational models3%
F16LPipes2%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution2%
B82YSpecific uses or applications of nanostructures2%
PatentTitleYear
11,114,210Control rod operation monitoring method and control rod operation monitoring system202111,070,739Endoscope system having a first light source for imaging a subject at different depths and a second light source having a wide band visible band202110,863,104Endoscope system202010,782,125Interference fringe projection optical system and shape measurement apparatus202010,777,704Manufacturing method for group III nitride semiconductor substrate and group III nitride semiconductor substrate202010,682,043Measurement probe and bio-optical measurement system with contact detection202010,451,450External device for measuring instrument201910,302,612Hydrogen concentration measuring device201910,295,324Measuring instrument201910,292,221Solid-state light source lighting device, luminaire, vehicle lamp, and two-wheeled vehicle201910,149,619Measurement probe and biological optical measurement system20189,880,383'Display device'20189,615,211'Server for home appliance network system'20179,560,706'Lightening apparatus having matrix-arranged light-emitting elements'20179,454,002'Wavelength selection switch'20169,232,617'Discharge lamp electronic ballast luminaire and vehicle with same'20169,175,142'Transportation method for water-absorbing resin powder substance'20159,106,362'Optical unit for wavelength selecting switch and wavelength selecting switch'20159,096,732'Conveyance method for water-absorbing resin powder substance'20158,958,693'Wavelength selective switch'20158,941,321'Discharge lamp lighting device, and illumination apparatus and vehicle including same'20158,912,298'Method for producing particulate water absorbing agent containing water absorbent resin as main component'20148,864,530'Jack with a switch mechanism having a movable insulation separator'20148,849,077'Wavelength selective switch'20148,809,475'Production method for water-absorbent resin'20148,789,074'Optical disc apparatus'20148,761,554'Wavelength selective switch'20148,752,077'Optical disc apparatus'20148,673,465'Magnetic recording medium, method of fabricating the same, and storage apparatus'20148,659,812'Wavelength selective switch'20148,640,151'Optical disk apparatus'20148,634,129'Wavelength selective switch'20148,606,104'Wavelength selective switch'20138,589,960'Optical disc drive'20138,549,549'Optical disk device having an air flow shielding portion'20138,544,507'Method for filling particulate water-absorbing agent having as a main component water-absorbing resin'20138,518,474'Method for producing iodine type polarizing film'20138,499,315'Grounding structure for optical disc drive'20138,436,090'Production method and method for enhancing liquid permeability of water-absorbing resin'20138,424,786'Method for production of particulate water absorbent comprising water-absorbable resin as main ingredient'20138,424,029'Optical disc device'20138,410,223'Production method for water-absorbing resin'20138,375,403'Optical disc device'20138,332,879'Optical disk drive'2012D0670585'Inside diameter measurement tool'20128,250,591'Tray of optical disk device and optical disk device including the same'20128,181,190'Optical disc apparatus'20128,148,485'Production method for water-absorbing resin'20128,138,292'Method for producing particulate water—absorbing agent composed principally of water absorbing resin'20128,125,639'Temperature compensated spectroscope and optical apparatus'20128,110,486'Method of manufacturing semiconductor wafer by forming a strain relaxation SiGe layer on an insulating layer of SOI wafer'20128,012,383'Method for producing polarizing film'20117,977,221'Method for producing strained Si-SOI substrate and strained Si-SOI substrate produced by the same'20117,898,743'Image forming optical system and electronic image pickup apparatus using image forming optical system'20117,887,728'Spinning pack for dry-wet spinning, diverting guide for fiber bundle, and apparatus and method for producing fiber bundle'20117,876,994'Optical fiber array'20117,877,761'Optical disc apparatus'20117,873,137'Reactivity control arrangement and fast reactor'20117,848,030'Image forming optical system and electronic image pickup apparatus using image forming optical system'20107,800,832'Image forming optical system and electronic image pickup apparatus using image forming optical system'20107,768,731'Magnetic recording medium, magnetic storage and method for reproducing information from magnetic recording medium'20107,767,548'Method for manufacturing semiconductor wafer including a strained silicon layer'20107,762,154'Synchromesh automatic transmission'20107,715,108'Image forming optical system and electronic image pickup apparatus using image forming optical system'20107,708,029'Coupling member of pipe coupling'20107,706,564'Diaphragm and speaker'20107,669,612'Pipe coupling and male coupling member'20107,672,074'Thermally assisted magnetic recording method'20107,665,102'Heat-assisted magnetic recording method and test record reproduction method'20107,601,763'Diaphragm for speaker and manufacturing method thereof'20097,561,360'Magnetic recording medium'20097,548,398'Thermally assisted magnetic recording medium'20097,537,246'Pipe coupler'20097,502,188'Magnetic recording medium, magnetic storage and method for reproducing information from magnetic recording medium'20097,401,762'Solenoid-operated valve for use with fuel cells'20087,306,007'Pipe coupling including ball valve'20077,144,641'Magnetic backlayer'20067,136,225'Polarizing plate and method for producing the same'20067,111,819'Stop ring and a hydraulic/pneumatic device equipped with a stop ring'20066,929,092'Speaker diaphragm'20056,928,033'Magneto-optical recording medium having a plurality of heat-radiation films'20056,911,498'Composition for vulcanizing fluororubbers and fluororubber moldings'20056,904,944'Fuel filling device and fuel leakage detection method'20056,898,158'Information recording medium and information recording and reproducing slider'20056,898,157'Optical head having a plurality of coil elements connected in parallel to each other'20056,871,837'Valve structure for use in a pipe coupling and a pipe coupling comprising the valve structure'20056,869,315'Jack'20056,865,039'Master medium for magnetic transfer, magnetic transferring and recording method, slave medium for magnetic recording, and method for producing a master medium for magnetic transfer'20056,849,197'Ice thermal storage medium'20056,830,070'Fluid coupler automatically uncouplable in an emergency'20046,814,181'Electrically conductive damper device for speaker'2004D0497414'Socket of pipe coupling for charging hydrogen'20046,763,587'Manufacturing method of component part for variable capacity turbine, and the structure'20046,727,007'Magneto-optical recording medium with reflective layer formed from two thin films possessing different surface tensions'20046,720,075'Magnetic recording medium and magnetic recording medium driver for the medium with N-type ferrimagnetic recording layer'20046,716,522'Molded article from thermoplastic composite material and method for producing the same'20046,687,197'High density information recording medium and slider having rare earth metals'20046,678,149'Solid electrolytic capacitor and method of manufacturing the capacitor'20046,669,442'Method and device for assembling and adjusting variable capacity turbine'2003D0482432'Socket of pipe coupling for charging hydrogen'20036,606,136'Iodine-type polarizing plate enables neutral white in white display and neutral black in black display'20036,590,990'Speaker apparatus'20036,567,347'Optical head having a plurality of coil elements connected in parallel to each other'20036,421,303'MULTILAYER RESONANCE DEVICE AND MAGNETO-OPTICAL RECORDING MEDIUM WITH MAGNETIC CENTER LAYER OF A DIFFERENT THICKNESS THAN THAT OF THE COMPONENTS OF THE REFLECTING LAYERS, AND METHOD OF REPRODUCING THE SAME'20026,396,774'Information reproducing device, information recording/reproducing head, and information reproducing method utilizing mono-magnetic domain structure'20026,356,516'Magneto-optical recording medium and reproducing method for information recorded on the medium'20026,262,949'Multilayer resonance device and magneto-optical recording medium with magnetic center layer of a different thickness than that of the components of the reflecting layers'20016,248,439'Magneto-optical recording medium and reproducing method for information recorder on the medium'20016,228,943'Fluorine-containing elastomer composition'20016,139,980'Reading method of reading information from a recording medium and medium used therefor'20006,128,254'Magneto-optical recording medium and reproducing method for information recorded on the medium'20006,096,444'Magneto-optical recording medium capable of double mask readout'20006,030,716'Magneto-optical recording medium and method of reproducing information recorded on such medium'20006,020,079'Magneto-optical recording medium and reproducing method for information recorded on the medium'20005,920,206'Differential ECL'19995,899,750'Fine processing method'19995,891,941'Fluororubber composition and molded article thereof'19995,850,155'BIMOS logic circuit directly controllable by a CMOS block formed on same IC chip'19985,807,116'Multipolar electrical jack'19985,759,069'Multipolar electrical plug'19985,740,133'Magneto-optical recording medium capable of double mask readout'19985,723,227'Magneto-optical recording medium and reproducing method for information recorded on the medium'19985,710,837'Branch deletion method for thinned image'19985,691,072'Magneto-optical recording medium and method of reproducing information recorded on such medium'19975,664,069'Data processing system'19975,633,988'Adaptation method for data processing system'19975,627,912'Inspection method of inclination of an IC'19975,623,458'Method for reproducing information data recorded on a magneto-optical device having plural magnetic layers'19975,599,605'Magneto-optical recording medium and method for producing the same'19975,552,850'Handle grip to be detachably fixed to a disposable camera equipped with a spool of film'19965,553,196'Method for processing data using a neural network having a number of layers equal to an abstraction degree of the pattern to be processed'19965,548,576'Optical recording medium and data reproducing apparatus for reproducing data from such optical recording medium'19965,463,717'Inductively coupled neural network'19955,434,802'Method of detecting the inclination of an IC'19955,394,510'Neural network-type data processing system recognizing a predetermined shape using inhibitory connections'19955,381,396'Magneto-optical recording method and apparatus for recording information on a magneto-optical recording media'19955,362,795'Process for producing rubber-containing graft copolymer particles'19945,361,328'Data processing system using a neural network'19945,349,017'Polyvinyl chloride resin composition'19945,306,763'Process for the preparation of rubber-containing graft copolymer particles'19945,259,065'Data processing system'19935,250,590'Flame retardant resin composition'19935,231,678'Configuration recognition system calculating a three-dimensional distance to an object by detecting cross points projected on the object'19935,195,171'Data processing system'19935,185,816'Method of selecting characeteristics data for a data processing system'19935,007,851'Power socket'19914,829,155'Hair styler having a heat pipe forming the hair winding portion'19894,779,204'Feed control method in a numerically controlled machine tool'19884,528,633'Method of controlling indexing of magazine pockets in machining center'19854,327,801'Cylindrical heat exchanger using heat pipes'19824,206,807'Cylindrical heat exchanger using heat pipes'19804,021,318'Process for producing aluminum'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977–2013Based in Niihama, JP· patent location history
1993–2021Based in Tokyo, JP· patent location history
1995–2010Patents assigned to FUJITSU LTD (30)· patent assignee history
1995–2017Based in Kawasaki, JP· patent location history
2010–2021Patents assigned to OLYMPUS CORP (13)· patent assignee history
2010–2020Based in Hachioji, JP· patent location history
2011–2014Patents assigned to HITACHI LG DATA STORAGE INC (11)· patent assignee history
2012–2017Patents assigned to MATSUMOTO KOJI (34)· patent assignee history
2012–2015Patents assigned to NIPPON CATALYTIC CHEM IND (10)· patent assignee history
2012–2015Based in Himeji, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
MATSUMOTO KOJIself342012–2017
FUJITSU LTD301995–2010
OLYMPUS CORP132010–2021
HITACHI LG DATA STORAGE INC112011–2014
NIPPON CATALYTIC CHEM IND102012–2015
Locations
LocationPatentsSpan
Tokyo, JP411993–2021
Kawasaki, JP331995–2017
Hachioji, JP142010–2020
Himeji, JP92012–2015
Niihama, JP51977–2013