Atsushi Numagami
106Patents
54h-index
57Co-inventors
93Inventor score
Filing activity: Jul 15, 1992 → Nov 10, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5920753A | Process cartridge and electrophotographic image forming apparatus | Physics | 253 | Expired |
| US6608980B2 | Electrophotographic image forming apparatus to which a process cartridge is detachably mountable and process cartridge comprising cartridge drum positioning portion or recess | Physics | 239 | Expired |
| US6385416B1 | Space securing member, developing device, charging device and process cartridge | Physics | 199 | Expired |
| US7158736B2 | Process cartridge having first and second rotatably coupled frames and electrophotographic image forming apparatus mounting such process cartridge | Physics | 197 | Expired |
| US5966566A | Recycle method for process cartridge and image forming apparatus | Physics | 183 | Expired |
| US7184690B2 | Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatus | Physics | 177 | Expired |
| US5500714A | Process cartridge, method for assembling process cartridge and image forming appararatus | Physics | 166 | Expired |
| US5768658A | Electrode member, developing apparatus, process cartridge and image forming apparatus | Physics | 164 | Expired |
| US6898391B2 | Process cartridge, electric contact and electrophotographic image forming apparatus | Physics | 159 | Expired |
| US6577831B1 | ELECTROPHOTOGRAPHIC IMAGE FORMING APPARATUS TO WHICH A PROCESS CARTRIDGE IS DETACHABLY MOUNTABLE AND PROCESS CARTRIDGE HAVING A SUPPORTING MEMBER FOR ROTATABLY SUPPORTING A DEVELOPING ROLLER AT A POSITION AWAY FROM THE CENTER OF ROTATION THEREOF | Physics | 154 | Expired |
| US6954601B2 | Process cartridge and electrophotographic image forming apparatus | Physics | 154 | Expired |
| US6714752B2 | Process cartridge, load producing member and electrophotographic image forming apparatus | Physics | 153 | Expired |
| US6131007A | Developing device, process cartridge and electrophotographic image forming apparatus | Physics | 151 | Expired |
| US7209682B2 | Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatus | Physics | 149 | Expired |
| US7003247B2 | Electrophotographic photosensitive drum, process cartridge, and electrophotographic image forming apparatus | Physics | 148 | Expired |
| US6272299A | Process cartridge and electrophotographic image forming apparatus | Physics | 145 | Expired |
| US6829455B2 | Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatus | Physics | 144 | Expired |
| US7315710B2 | Electrophotographic photosensitive drum supporting apparatus, process cartridge and electrophotographic image forming apparatus | Physics | 141 | Active |
| US5543898A | Process cartridge, method for assembling process cartridge and image forming apparatus | Physics | 138 | Expired |
| US7212768B2 | Process cartridge and electrophotographic image forming apparatus | Physics | 133 | Expired |
| US7092658B2 | Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatus | Physics | 133 | Expired |
| US6029032A | Process cartridge and electrophotographic image forming apparatus | Physics | 131 | Expired |
| US6978099B2 | Developing apparatus, process cartridge, and electrophotographic image forming apparatus including an elastic member preventing a gap between a developing agent carrier and a layer thickness limiter from changing, and an electrophotographic image forming apparatus detachably mounting such process cartridge | Physics | 124 | Expired |
| US6834175B2 | Developer agitating member | Physics | 122 | Expired |
| US6006058A | Process cartridge and electrophotographic image forming apparatus having an improved driving system | Physics | 121 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.