Kazuyuki Fukui
50Patents
15h-index
51Co-inventors
87Inventor score
Filing activity: May 4, 1981 → Jan 23, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4801134A | Paper feed apparatus capable of feeding of common use papers and specifically processed papers | Performing Operations; Transporting | 42 | Expired |
| US5206686A | Apparatus for forming an image with use of electrophotographic process including gradation correction | Physics | 37 | Expired |
| US5189441A | Image forming apparatus having density control | Physics | 32 | Expired |
| US5124751A | Image forming apparatus with a toner density control device | Physics | 28 | Expired |
| US5005517A | Developing device | Physics | 27 | Expired |
| US4496145A | Sheet feeding apparatus | Performing Operations; Transporting | 22 | Expired |
| US5983044A | Image forming apparatus with transfer efficiency control | Physics | 22 | Expired |
| US4852868A | Automatic paper feeding apparatus | Performing Operations; Transporting | 21 | Expired |
| US5146274A | Toner density measurement apparatus having output characteristics variable with humidity | Physics | 20 | Expired |
| US4515358A | Sheet feeding apparatus | Performing Operations; Transporting | 19 | Expired |
| US4928951A | Automatic paper feed device | Performing Operations; Transporting | 19 | Expired |
| US7843298B2 | Power distribution transformer and tank therefor | Electricity | 19 | Active |
| US4745439A | Copying apparatus | Physics | 17 | Expired |
| US5585927A | Digital image forming apparatus having gradation characteristic setting means | Electricity | 16 | Expired |
| US4935776A | Image forming apparatus | Physics | 16 | Expired |
| US5212560A | Electrophotographic image forming apparatus comprising means for automatically adjusting image reproduction density | Electricity | 15 | Expired |
| US5453773A | Electrophotographic image forming apparatus comprising means for automatically adjusting image reproduction density | Physics | 14 | Expired |
| US5250959A | Electrophotographic image forming apparatus and method | Electricity | 14 | Expired |
| US5633669A | Image forming apparatus for synthesizing a differential peak signal and an image signal | Electricity | 11 | Expired |
| US5729626A | Digital image forming apparatus | Electricity | 10 | Expired |
| US7652781B2 | Data processing system, data processing method, and data processing program product suited for transmitting and receiving data among a plurality of image processing apparatuses | Physics | 10 | Active |
| US4867436A | Sheet aligning arrangement | Performing Operations; Transporting | 10 | Expired |
| US4395034A | Sheet feeding device | Performing Operations; Transporting | 9 | Expired |
| US5719613A | Apparatus for forming an image with use of electrophotographic process | Physics | 8 | Expired |
| US5959650A | Apparatus for forming an image with use of electrophotographic process | Electricity | 7 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.