Director-General of Agency of Industrial Science and Technology
330Patents
0Active
330Granted
41Portfolio score
Filing activity: Apr 5, 1973 → Nov 23, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4487635A | Method of fabricating a multi-layer type semiconductor device including crystal growth by spirally directing energy beam | Electricity | 279 | Expired |
| US5482601A | Method and device for the production of carbon nanotubes | Emerging Cross-Sectional Technologies | 123 | Expired |
| US4695247A | Combustor of gas turbine | Mechanical Engineering; Lighting; Heating | 117 | Expired |
| US5560898A | Process of isolating carbon nanotubes from a mixture containing carbon nanotubes and graphite particles | Emerging Cross-Sectional Technologies | 111 | Expired |
| US5773834A | Method of forming carbon nanotubes on a carbonaceous body, composite material obtained thereby and electron beam source element using same | Emerging Cross-Sectional Technologies | 97 | Expired |
| US5318865A | Redox battery | Emerging Cross-Sectional Technologies | 85 | Expired |
| US6278056A | Metal complex useful as sensitizer, dye-sensitized oxide semiconductor electrode and solar cell using same | Emerging Cross-Sectional Technologies | 75 | Expired |
| US5206087A | Biodecomposable or biodisintegrable moldable material | Emerging Cross-Sectional Technologies | 71 | Expired |
| US4925770A | Contrast-enhancing agent for photolithography | Physics | 64 | Expired |
| US4814241A | Electrolytes for redox flow batteries | Emerging Cross-Sectional Technologies | 62 | Expired |
| US5651953A | Method of producing hydrogen from biomass | Chemistry; Metallurgy | 62 | Expired |
| US5124371A | Biodegradable plastic composition, biodegradable plastic shaped body and method of producing same | Chemistry; Metallurgy | 53 | Expired |
| US5445669A | Membrane for the separation of carbon dioxide | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5374291A | Method of processing photosensitive glass | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5695734A | Process for the separation of carbon nanotubes from graphite | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4379852A | Boride-based refractory materials | Chemistry; Metallurgy | 42 | Expired |
| US5322675A | Method of preparing calcium phosphate | Chemistry; Metallurgy | 42 | Expired |
| US5110838A | Biodisintegrable thermoplastic resin foam and a process for producing same | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4645722A | Photo-thermo-magnetic recording medium and method of preparing same | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5306550A | Biodegradable composition and shaped article obtained therefrom | Emerging Cross-Sectional Technologies | 39 | Expired |
| US4579882A | Shielding material of electromagnetic waves | Electricity | 37 | Expired |
| US5476787A | Method of removing nitrogen impurities from water using hydrocarbon-producing microalga | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5250158A | Method for producing vanadium electrolytic solution | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5282886A | Gas adsorption and desorption method | Performing Operations; Transporting | 36 | Expired |
| US4868632A | Nonvolatile semiconductor memory | Electricity | 35 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.