Yasushi Okabe
218Patents
22h-index
32Co-inventors
90Inventor score
Filing activity: Oct 10, 1990 → Apr 26, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6041203A | Process unit, photosensitive member cartridge, developer cartridge, and image forming apparatus | Physics | 142 | Expired |
| US6823160B2 | Developing device and image forming apparatus having a gear holder | Physics | 136 | Expired |
| US6101350A | Photosensitive member cartridge and developer cartridge for use in an image-forming apparatus | Physics | 110 | Expired |
| US6330410A | Photosensitive member cartridge | Physics | 93 | Expired |
| USD422304S | Toner cartridge | General | 77 | Expired |
| US7756443B2 | Image forming apparatus and developing cartridge having driving input and guide | Physics | 76 | Active |
| US7720405B2 | Image forming apparatus | Physics | 70 | Active |
| US8731438B2 | Image forming device and cartridge that transmit a driving force | Physics | 67 | Active |
| USD471583S1 | Photosensitive drum unit | General | 67 | Expired |
| USD471228S1 | Toner cartridge | General | 66 | Expired |
| USD423559S | Image forming device for printer | General | 57 | Expired |
| US6411789B1 | Photosensitive member cartridge | Physics | 53 | Expired |
| US5229824A | Developer material supplying device for integral type processing unit assembled in electrophotographic type image recording apparatus | Emerging Cross-Sectional Technologies | 47 | Expired |
| US6546217B2 | Photosensitive member cartridge | Physics | 41 | Expired |
| US6751428B2 | Image forming device and detachably loaded process unit | Physics | 40 | Expired |
| US7684728B2 | Image forming apparatus, process unit and developing cartridge | Physics | 30 | Active |
| US6690903B2 | Photosensitive member cartridge | Physics | 29 | Expired |
| US8078085B2 | Image forming apparatus | Physics | 27 | Active |
| US8358952B2 | Tandem-type process unit removably loaded in image forming device | Physics | 23 | Active |
| USD596663S1 | Printer cartridge | General | 23 | Expired |
| US7835665B2 | Photosensitive unit and image forming apparatus | Physics | 22 | Active |
| USD588190S1 | Printer cartridge | General | 22 | Expired |
| US5231453A | Image recording apparatus with rolled protective cover for process unit | Physics | 21 | Expired |
| US7426355B2 | Tandem photosensitive-member unit having grip part | Physics | 21 | Active |
| US5153640A | Image recording apparatus having a recording unit detachably assembled therein with a selectively opened portion | Physics | 20 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.