Eiji Takenaka
28Patents
18h-index
24Co-inventors
81Inventor score
Filing activity: May 11, 1989 → Dec 27, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5617191A | Toner conveyor roller and image forming apparatus having the same | Physics | 50 | Expired |
| US5489747A | Developing device for an image forming apparatus | Physics | 50 | Expired |
| US5826144A | Developing device for an electrophotographic recording apparatus including bias control of a toner supplying roller | Physics | 43 | Expired |
| US5625440A | Developing device having seals between a toner transport roller and the toner hopper which prevent toner leakage and scattering | Physics | 42 | Expired |
| US5697026A | Developing device having the lengths of two toner transporting rollers and an image bearing member in specific relationships | Physics | 40 | Expired |
| US5666625A | Device for electrostatically developing a latent image on an image carrier | Physics | 38 | Expired |
| US5708942A | Developing device for an image forming apparatus | Physics | 37 | Expired |
| US5625441A | Developing device for an image forming apparatus | Physics | 36 | Expired |
| US5486909A | Developing device for an image forming apparatus | Physics | 35 | Expired |
| US5879752A | Method of coating a toner conveyor roller | Physics | 35 | Expired |
| US5768665A | Image forming apparatus with bias control to prevent undesirable toner deposition | Physics | 35 | Expired |
| US7246655B2 | Heat transfer device | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US5845183A | Developing device for an image forming apparatus | Physics | 32 | Expired |
| US5863036A | Sheet feeding device and image forming apparatus having the same | Performing Operations; Transporting | 30 | Expired |
| US5897243A | Electrophotographic recording apparatus configured to switch a bias voltage in a developing unit | Physics | 29 | Expired |
| US6033818A | Developing device for an image forming apparatus | Physics | 29 | Expired |
| US5625438A | Toner, and devices for electrostatically depositing a uniform application thereof | Physics | 27 | Expired |
| US5552870A | Developing device for an image forming apparatus | Physics | 26 | Expired |
| US4926191A | Image recording apparatus and method of carrying out initializing process in image recording apparatus | Performing Operations; Transporting | 12 | Expired |
| US5610693A | Developing device for an image forming apparatus | Physics | 8 | Expired |
| US5617190A | Developing device for an image forming apparatus which reduces toner consumption and waste | Physics | 8 | Expired |
| US5268766A | Facsimile apparatus with two different sized paper supply rolls having timer/counter to choose primary supply roll to prevent curling | Electricity | 8 | Expired |
| US6131902A | Sheet feeding paths for apparatus with feed paths selectable to correspond to desired function of apparatus | Electricity | 7 | Expired |
| US7540319B2 | Heat transfer device | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US5915157A | Sheet transport system and apparatus for an image-forming apparatus with crossing sheet transport paths | Electricity | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.