Kenji Okamoto
226Patents
27h-index
320Co-inventors
93Inventor score
Filing activity: Nov 24, 1980 → Jun 7, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4867629A | Dusttight storage cabinet apparatus for use in clean rooms | Emerging Cross-Sectional Technologies | 386 | Expired |
| US6724452B1 | Vertically aligned (VA) liquid crystal display device | Physics | 267 | Expired |
| US6661488B1 | Vertically-alligned (VA) liquid crystal display device | Physics | 254 | Expired |
| US5374570A | Method of manufacturing active matrix display device using insulation layer formed by the ale method | Electricity | 237 | Expired |
| US5473455A | Domain divided liquid crystal display device with particular pretilt angles and directions in each domain | Physics | 139 | Expired |
| US4560249A | Method of forming diffraction gratings and optical branching filter elements produced thereby | Physics | 86 | Expired |
| US6066587A | Catalyst for purifying exhaust gas | Emerging Cross-Sectional Technologies | 83 | Expired |
| US7304703B1 | Vertically-aligned (VA) liquid crystal display device | Physics | 65 | Expired |
| US7167224B1 | Vertically-aligned (VA) liquid crystal display device | Physics | 63 | Expired |
| US5296855A | Offset correction apparatus of turning angular velocity sensor | Physics | 61 | Expired |
| US4639208A | Pulse combustion apparatus with a plurality of pulse burners | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US6650559B1 | Power converting device | Electricity | 54 | Expired |
| US7224421B1 | Vertically-aligned (VA) liquid crystal display device | Physics | 53 | Expired |
| US4673241A | Diffraction gratings and optical branching filter elements | Physics | 50 | Expired |
| US4904153A | Transporting robot for semiconductor wafers | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4794655A | Truck type patient-moving device | Human Necessities | 45 | Expired |
| US5889337A | Integrated instrument panel switch assembly | Performing Operations; Transporting | 44 | Expired |
| US5742074A | Thin film transistor matrix device and method for fabricating the same | Physics | 39 | Expired |
| US4395987A | Distribution type fuel injection apparatus | Emerging Cross-Sectional Technologies | 39 | Expired |
| US6583835B1 | Alignment films in a liquid crystal display device and a method of manufacturing the same | Physics | 38 | Expired |
| US6438000B1 | Noise-cut filter | Electricity | 38 | Expired |
| US6236918A | Vehicle electronic control apparatus | Performing Operations; Transporting | 38 | Expired |
| US5677258A | Burned gas purifying catalyst | Emerging Cross-Sectional Technologies | 36 | Expired |
| US6221804A | Catalyst for purifying exhaust gas and manufacturing method thereof | Performing Operations; Transporting | 35 | Expired |
| US7227606B2 | Vertically-alligned (VA) liquid crystal display device | Physics | 33 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.