Yuuji Sawai
34Patents
15h-index
33Co-inventors
77Inventor score
Filing activity: Oct 27, 2000 → May 13, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6697595B2 | Method and apparatus for forming an image with no degradation | Physics | 51 | Expired |
| US6618565B2 | Transfer bias applying method for an image forming apparatus and device for the same | Physics | 49 | Expired |
| US6611672B2 | Image forming apparatus, monocolor image forming apparatus, toner recycling apparatus and intermediate transfer member | Physics | 44 | Expired |
| US6901234B2 | Image forming apparatus including an intermediate image transfer belt and high resistance contact member | Physics | 43 | Expired |
| US6741821B2 | Image forming apparatus, and process cartridge for use in image forming apparatus | Physics | 39 | Expired |
| US7003238B2 | Intermediate image transfer device for a color image forming apparatus | Physics | 39 | Expired |
| US6829450B2 | Transfer bias applying method for an image forming apparatus and device for the same | Physics | 38 | Expired |
| US6785500B2 | Image forming apparatus including image transfer body with elastic layer and coating layer | Physics | 35 | Expired |
| US7203433B2 | Apparatus for detecting amount of toner deposit and controlling density of image, method of forming misalignment correction pattern, and apparatus for detecting and correcting misalignment of image | Physics | 27 | Expired |
| US6516179B1 | Image forming apparatus, image transferring device and recording medium conveying method | Physics | 25 | Expired |
| US6823149B2 | Image forming apparatus with variable speed transferring and fixing devices | Physics | 23 | Expired |
| US7280792B2 | Method for evaluating changes in resistance of electric resistance member and image forming apparatus using same | Physics | 22 | Expired |
| US7346287B2 | Transfer device for forming a stable transfer electric field, and an image forming apparatus including the transfer device | Physics | 19 | Expired |
| US7502583B2 | Transfer device and image forming apparatus for enhancement of an image stored on a recording medium | Physics | 18 | Expired |
| US7610004B2 | Apparatus for detecting amount of toner deposit and controlling density of image, method of forming misalignment correction pattern, and apparatus for detecting and correcting misalignment of image | Physics | 17 | Active |
| US6768892B2 | Image forming apparatus with a photoconductive element and intermediate image transfer member | Physics | 15 | Expired |
| US7174124B2 | Tandem color image forming apparatus with an image transfer belt and backup roller | Physics | 14 | Expired |
| US6813471B2 | Image forming apparatus, image transferring device and recording medium conveying method | Physics | 14 | Expired |
| US6885842B2 | Image forming apparatus with photoconductive element and intermediate image transfer member | Physics | 10 | Expired |
| US6983121B2 | Image forming apparatus, image transferring device and recording medium conveying method | Physics | 8 | Expired |
| US9238552B2 | Belt tracking system, roller assembly, and image forming apparatus including same | Physics | 7 | Active |
| US8657104B2 | Belt positioning system, multi-roller assembly and image forming apparatus employing same | Physics | 5 | Active |
| US9561912B2 | Belt tracking system, multi-roller assembly and image forming apparatus employing same | Physics | 4 | Active |
| US7277662B2 | Belt member, belt driving unit, and image forming apparatus | Physics | 4 | Expired |
| US8014708B2 | Belt member, transfer unit incorporating same, image forming apparatus incorporating same, and method of evaluating same | Physics | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.