Koji Yamaguchi
221Patents
37h-index
277Co-inventors
93Inventor score
Filing activity: May 20, 1976 → May 7, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5632002A | Speech recognition interface system suitable for window systems and speech mail systems | Electricity | 251 | Expired |
| US6681088B2 | Process cartridge, image forming apparatus and separating mechanism for separating developing member from photosensitive drum | Physics | 216 | Expired |
| US7136604B2 | Process cartridge having electrical contact connectable to electrical contact in electrophotographic image forming apparatus | Electricity | 201 | Expired |
| US6834173B2 | Image-forming-apparatus process cartridge having a locking portion to prevent the cartridge from disengaging from the image forming apparatus and an image forming apparatus mounting such a cartridge | Physics | 102 | Expired |
| US6961528B2 | Cartridge and electrophotographic image forming apparatus | Physics | 93 | Expired |
| US6947687B2 | Cartridge having locking portion for locking cartridge with an image forming apparatus and releasing portion to release the locking portion, and image forming apparatus having such a cartridge | Physics | 93 | Expired |
| US6782219B2 | Cartridge and electrophotographic image forming apparatus | Physics | 87 | Expired |
| US7068965B2 | Developing cartridge, side cover mounting method and electrophotographic image forming apparatus | Physics | 84 | Expired |
| US7116925B2 | Process cartridge and image forming apparatus | Physics | 78 | Expired |
| US9494890B2 | Developing cartridge, process cartridge and image forming apparatus | Physics | 78 | Active |
| US6464586B1 | Game unit | Physics | 77 | Expired |
| US8577252B2 | Process cartridge and disassembling method of the process cartridge | Physics | 75 | Active |
| US6983115B2 | Developing cartridge and process cartridge having first and second projected portions and image forming apparatus mounting such a developing cartridge | Physics | 74 | Expired |
| US6915092B2 | Process cartridge remanufacturing method | Physics | 73 | Expired |
| US6916725B2 | Method for manufacturing semiconductor device, and method for manufacturing semiconductor module | Electricity | 71 | Expired |
| US7194225B2 | Process cartridge and image forming apparatus | Physics | 67 | Expired |
| US7184687B2 | Process cartridge mountable to image forming apparatus having positioning portion to engage a member of the apparatus and having member to contact urging member of the apparatus and such image forming apparatus | Physics | 59 | Active |
| US7223634B2 | Semiconductor device, method for manufacturing the same, circuit board, and electronic apparatus | Electricity | 58 | Expired |
| US7319834B2 | Process cartridge and image forming apparatus | Physics | 56 | Active |
| US9063464B2 | Developer containing unit, process cartridge, and electrophotographic image forming apparatus | Physics | 55 | Active |
| US7519310B2 | Process cartridge having cartridge positioning portion and movable member and image forming apparatus mounting said process cartridge | Physics | 54 | Active |
| US7477865B2 | Process cartridge and image forming apparatus | Physics | 53 | Active |
| US7792460B2 | Process cartridge having cartridge positioning portion and image forming apparatus mounting said process cartridge | Physics | 52 | Active |
| US5818436A | Apparatus and method for playing back continuous data | Physics | 52 | Expired |
| US8867955B2 | Developer accommodating unit, process cartridge and electrophotographic image forming apparatus | Physics | 51 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.