Hitoshi Ishibashi
60Patents
14h-index
75Co-inventors
87Inventor score
Filing activity: Sep 23, 1994 → Mar 10, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6505022B2 | Image forming apparatus having protective layer on the surface of image bearing member to avoid adhesion of film of additives to image bearing member | Emerging Cross-Sectional Technologies | 61 | Expired |
| US5659843A | Image transferring device for image forming equipment | Physics | 35 | Expired |
| US6546219B2 | Method and apparatus for performing a charging process on an image carrying device | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6470161B2 | Apparatus for minimizing toner contamination on an image formation member | Physics | 34 | Expired |
| US6360065B1 | Method and apparatus for image forming capable of effectively generating a consistent charge potential | Physics | 33 | Expired |
| US5623330A | Image forming apparatus | Emerging Cross-Sectional Technologies | 25 | Expired |
| US6823149B2 | Image forming apparatus with variable speed transferring and fixing devices | Physics | 23 | Expired |
| US7251420B2 | Method and apparatus for image forming capable of effectively detecting toner density | Physics | 23 | Expired |
| US6519428B1 | Image forming apparatus having mixed toner consumption mode | Physics | 22 | Expired |
| US7228081B2 | Method and apparatus for image forming capable of controlling image-forming process conditions | Physics | 21 | Expired |
| US5438401A | Multicolor image forming method and apparatus therefor | Physics | 21 | Expired |
| US7139511B2 | Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density | Physics | 16 | Expired |
| US7174124B2 | Tandem color image forming apparatus with an image transfer belt and backup roller | Physics | 14 | Expired |
| US7260335B2 | Image-information detecting device and image forming apparatus | Physics | 14 | Expired |
| US7616909B2 | Image forming apparatus and image forming method | Physics | 12 | Active |
| US6778797B2 | Charging roller having elastic member | Physics | 10 | Expired |
| US8155543B2 | Image forming apparatus capable of reducing a lengthy duration of an adjustment control | Physics | 8 | Active |
| US7443535B2 | Misalignment correction pattern formation method and misalignment correction method | Performing Operations; Transporting | 8 | Expired |
| US7305195B2 | Image forming apparatus, method of calculating amount of toner transfer, methods of converting regular reflection output and diffuse reflection output, method of converting amount of toner transfer, apparatus for detecting amount of toner transfer, gradation pattern, and methods of controlling toner density and image density | Physics | 8 | Active |
| US7493058B2 | Image forming apparatus and toner concentration controlling method | Physics | 8 | Active |
| US7881629B2 | Image forming apparatus and image density control method | Physics | 7 | Active |
| US6782227B2 | Transfer device for setting a suitable recording medium adsorbing bias, and an image-forming apparatus including the transfer device | Physics | 6 | Expired |
| US7778560B2 | Image forming apparatus and method of adjusting charge bias | Physics | 6 | Active |
| US7055928B2 | Alignment pattern detecting sensor, method of determining acceptance width of the alignment pattern detecting sensor, method of forming alignment pattern, and image forming apparatus | Physics | 6 | Expired |
| US8045874B2 | Image forming apparatus and image density control method | Physics | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.