Keiji Okamoto
94Patents
10h-index
93Co-inventors
81Inventor score
Filing activity: Aug 25, 1987 → Jan 22, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5661061A | Process for fabricating a semiconductor integrated circuit device having the multi-layered fin structure | Electricity | 32 | Expired |
| US4878453A | Indicating instrument for automotive vehicle | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5132740A | Waste toner collecting device for an image recorder | Physics | 28 | Expired |
| US5390006A | Imaging forming apparatus with improved exhaust flow | Physics | 18 | Expired |
| US6484000B1 | Sealing member which prevents contamination when removed and container having the sealing member | Physics | 15 | Expired |
| US4970552A | Toner contamination preventive means | Physics | 14 | Expired |
| US4943128A | Light scanning device | Electricity | 12 | Expired |
| US8476138B2 | Semiconductor memory device and a method of manufacturing the same, a method of manufacturing a vertical MISFET and a vertical MISFET, and a method of manufacturing a semiconductor device and a semiconductor device | Electricity | 11 | Active |
| US4796037A | Compact image recording apparatus having an up-side down structure | Physics | 11 | Expired |
| US7190031B2 | Semiconductor memory device and a method of manufacturing the same, a method of manufacturing a vertical MISFET and a vertical MISFET, and a method of manufacturing a semiconductor device and a semiconductor device | Electricity | 10 | Expired |
| US7711308B2 | Cleaning device, process cartridge, and image forming apparatus | Physics | 9 | Active |
| US4939550A | Transfer paper guide device for an electrostatic photographic apparatus | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6009471A | Server system and methods for conforming to different protocols | Physics | 7 | Expired |
| US6562695B1 | Semiconductor integrated circuit device and method of manufacturing involving the scale-down width of shallow groove isolation using round processing | Electricity | 6 | Expired |
| US5055878A | Image forming apparatus | Physics | 6 | Expired |
| US10408690B2 | Manufacturing method of heat flux sensor and heat flow generation device for use in the manufacturing method | Physics | 6 | Active |
| US4776715A | Head rotating mechanism for a printer | Performing Operations; Transporting | 6 | Expired |
| US6070201A | Alternate selection of virtual data buffer pathways | Physics | 5 | Expired |
| US7972920B2 | Semiconductor memory device and a method of manufacturing the same, a method of manufacturing a vertical MISFET and a vertical MISFET, and a method of manufacturing a semiconductor device and a semiconductor device | Electricity | 5 | Active |
| US7319475B2 | Method and apparatus for image forming capable of preventing image quality deterioration induced by heat from an optical deflector | Electricity | 5 | Expired |
| US6752840B1 | Denim-like article of clothing and method of producing the same | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6823227B2 | Method and device for executing work consisting of a plurality of steps under computer control | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8712309B2 | Cleaning device, and image forming apparatus, process cartridge, and intermediate transfer unit each including the cleaning device | Physics | 3 | Active |
| US7495289B2 | Semiconductor memory device and a method of manufacturing the same, a method of manufacturing a vertical MISFET and a vertical MISFET, and a method of manufacturing a semiconductor device and a semiconductor device | Electricity | 3 | Active |
| US9998648B2 | Information processing apparatus, information processing method, photographing system, and program | Electricity | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.