Takanobu Yamada
70Patents
13h-index
48Co-inventors
84Inventor score
Filing activity: Aug 24, 1987 → Oct 10, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| 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 |
| US4939548A | Image forming apparatus | Physics | 25 | Expired |
| US6463236B2 | Image forming apparatus | Physics | 23 | Expired |
| US5014095A | Color image forming apparatus | Physics | 17 | Expired |
| US4928146A | Developing device | Physics | 17 | Expired |
| US5585927A | Digital image forming apparatus having gradation characteristic setting means | Electricity | 16 | Expired |
| US5212560A | Electrophotographic image forming apparatus comprising means for automatically adjusting image reproduction density | Electricity | 15 | Expired |
| US5893009A | Image forming apparatus and image forming method for changing sheet transport spacing according to environmental conditions | Physics | 14 | 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 |
| US4958191A | Developing device | Physics | 13 | Expired |
| US5499079A | Image density control apparatus and method for controlling image density on a photoconductor surface | Physics | 12 | Expired |
| US5146273A | Method and apparatus for preventing erroneous image density detection in an image forming apparatus | Physics | 11 | Expired |
| US5182603A | Separation charger control for electro-photographic apparatus | Physics | 11 | Expired |
| US5216469A | Apparatus for controlling toner density in a developing device of an electrophotographic or electrostatic image forming apparatus | Physics | 10 | Expired |
| US5729626A | Digital image forming apparatus | Electricity | 10 | Expired |
| US6823158B2 | Tandem style color image forming apparatus | Physics | 10 | Expired |
| US5157507A | Image forming apparatus that discriminates an image portion and a character portion | Electricity | 9 | Expired |
| US5539500A | Image forming apparatus with humidity controlling device | Physics | 9 | Expired |
| US4866481A | Image forming apparatus having a plurality of developers and a detection and control arrangement for detecting the density of a formed image and a controller for controlling the density of the image | Physics | 9 | Expired |
| US5974282A | Image forming apparatus | Physics | 9 | Expired |
| US10985407B2 | All-solid-state secondary battery including anode active material alloyable with lithium and method of charging the same | Emerging Cross-Sectional Technologies | 9 | Active |
| US5719613A | Apparatus for forming an image with use of electrophotographic process | Physics | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.