Keisuke Koga
26Patents
7h-index
41Co-inventors
69Inventor score
Filing activity: Sep 23, 1988 → Nov 19, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6400091B1 | Electron emission element and image output device | Emerging Cross-Sectional Technologies | 67 | Expired |
| US4948238A | Optical projection system | Physics | 34 | Expired |
| US6692327B1 | Method for producing electron emitting element | Electricity | 19 | Expired |
| US7825591B2 | Mesh structure and field-emission electron source apparatus using the same | Electricity | 18 | Active |
| US4870289A | Apparatus for controlling relation in position between a photomask and a wafer | Electricity | 16 | Expired |
| US5494179A | Field-emitter having a sharp apex and small-apertured gate and method for fabricating emitter | Electricity | 11 | Expired |
| US5909033A | Vacuum-sealed field-emission electron source and method of manufacturing the same | Electricity | 9 | Expired |
| US5434648A | Proximity exposure method and machine therefor | Physics | 6 | Expired |
| US5897790A | Field-emission electron source and method of manufacturing the same | Electricity | 5 | Expired |
| US8384281B2 | Matrix-type cold-cathode electron source device | Electricity | 4 | Active |
| US5925891A | Field-emission electron source | Electricity | 4 | Expired |
| US5227268A | X-ray mask and its fabricating method-comprising a first and second alignment pattern | Physics | 4 | Expired |
| US6818915B1 | Field-emission electron source | Electricity | 3 | Expired |
| US7112920B2 | Field emission source with plural emitters in an opening | Electricity | 2 | Expired |
| US8857500B2 | Heat exchange device and heat generating element containing device using same | Emerging Cross-Sectional Technologies | 2 | Active |
| US7190334B2 | Driving method and driving apparatus for a field emission device | Physics | 2 | Expired |
| US7365481B2 | Field emission device with change in emission property | Electricity | 2 | Expired |
| US6940218B2 | Doped field-emitter | Electricity | 2 | Expired |
| US7215072B2 | Field-emission electron source, method of manufacturing the same, and image display apparatus | Electricity | 1 | Expired |
| US7588475B2 | Field-emission electron source, method of manufacturing the same, and image display apparatus | Electricity | 1 | Active |
| US8294351B2 | Matrix-type cold-cathode electron source device | Electricity | 1 | Active |
| US6812654B2 | Field emission type electron source element, electron gun, cathode ray tube apparatus, and method for manufacturing cathode ray tube | Electricity | 0 | Expired |
| US6914373B2 | Electron lens and structure for a cold cathode of a cathode ray tube | Electricity | 0 | Expired |
| US6794822B2 | Field emission electron source, electron gun and cathode ray tube device using the same | Electricity | 0 | Expired |
| US8713959B2 | Heat generating body box housing refrigeration device | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.