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Inventor

Takamasa Yoshikawa

Inventor
Tsurugashima, JP

Overview

38→
Patents
1991–2011
Patent span
Electricity
Primary field (CPC H)

Patents· 38 as inventor

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

H01Jprimary
H01JElectric discharge tubes or discharge lamps34%
B82YSpecific uses or applications of nanostructures32%
G11BInformation storage based on relative movement between record carrier and transducer7%
G03BApparatus or arrangements for taking photographs or for projecting or viewing them5%
Y10TTechnical subjects covered by former us classification5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
G02BOptical elements, systems or apparatus3%
B24BMachines, devices, or processes for grinding or polishing1%
C23CCoating metallic material1%
F21VFunctional features or details of lighting devices or systems thereof1%
PatentTitleYear
7,994,698'Electron emitting device, display apparatus using electron emitting device, and method of manufacturing electron emitting device'20117,902,760'Electron emission device, and driving method thereof'20117,348,531'Photoelectric conversion device and image pickup device using electron emission devices'20087,125,144'Illumination device and illumination method'20067,118,227'Projection display device'20067,095,040'Electron-emitting device and method of manufacturing the same and display apparatus using the same'20067,033,030'Projection-type display apparatus'20067,010,939'Glass substrate for data recording medium and manufacturing method thereof'20066,787,992'Display device of flat panel structure with emission devices of matrix array'20046,776,510'Light source device, adjusting device therefore and production method therefore, and illuminating device and projection type display device provided with light source device'20046,744,063'Image pickup device including electron-emitting devices'20046,700,132'Flat panel display device utilizing electron emission devices'20046,641,887'Optical recording medium'20036,488,378'Imaging apparatus'20026,472,803'Electron emission light-emitting device and display apparatus using the same'20026,404,124'Electron emission device and display apparatus using the same'20026,400,070'Electron emission device and display device using the same'20026,388,376'Electron emission device with electron supply layer having reduced resistance'20026,316,873'Electron emission device and display device using the same'20016,285,123'Electron emission device with specific island-like regions'20016,278,230'Electron emission device and display device using the same'20016,259,198'Flat panel display apparatus with an array of electron emitting devices'20016,184,612'Electron emission device with electron supply layer of hydrogenated amorphous silicon'20016,166,487'Electron emission device and display device using the same'20006,147,443'Electron emission device and display device using the same'20006,144,155'Electron emission device and display device using the same'20006,130,503'Electron emission device and display using the same'20006,125,041'Card-type electronic device'20006,066,922'Electron emission device and display device using the same'20006,023,125'Electron emission device and display using the same'20005,990,605'Electron emission device and display device using the same'19995,986,390'Electron emission device having peak intensity ratio characteristic of raman spectrum for fold ring of SiO.sub.2'19995,894,189'Cold electron emission display device'19995,681,633'Magneto optical disc, apparatus for reproducing the same and method of reproducing the same'19975,382,460'Optical recording disk and production process therefor'19955,217,850'Optical recording disk and manufacturing method thereof'19935,087,340'Method of making magneto-optical recording disk'19925,000,834'Facing targets sputtering device'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–2002Patents assigned to PIONEER ELECTRONIC CORP (20)· patent assignee history
1991–2011Based in Saitama, JP· patent location history
1997–2011Based in Tsurugashima, JP· patent location history
2000Patents assigned to FUJITSU LTD (1)· patent assignee history
2000Based in Kawasaki, JP· patent location history
2001–2011Patents assigned to PIONEER CORP (11)· patent assignee history
2002–2006Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (5)· patent assignee history
2002–2006Based in Osaka, JP· patent location history
2006Patents assigned to HOYA CORP (1)· patent assignee history
2006Based in Suita, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
PIONEER ELECTRONIC CORP201991–2002
PIONEER CORP112001–2011
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD52002–2006
FUJITSU LTD12000
HOYA CORP12006
Locations
LocationPatentsSpan
Tsurugashima, JP251997–2011
Saitama, JP61991–2011
Osaka, JP42002–2006
Suita, JP22006
Kawasaki, JP12000