Kouji Ishigaki
16Patents
9h-index
39Co-inventors
68Inventor score
Filing activity: Jun 9, 1989 → Aug 17, 1998
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5751854A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Electricity | 101 | Expired |
| US6272248A | Original-discrimination system for discriminating special document, and image forming apparatus, image processing apparatus and duplicator using the original-discrimination system | Physics | 66 | Expired |
| US5659628A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 57 | Expired |
| US5652803A | Special-document discriminating apparatus and managing system for image forming apparatus having a special-document discriminating function | Electricity | 32 | Expired |
| US6160969A | Image forming apparatus with a voltage applying unit for image transfer | Physics | 32 | Expired |
| US5057867A | Image forming apparatus which corrects the image forming factors in response to density sensing means and duration of inactive state | Physics | 18 | Expired |
| US5341196A | Image forming equipment using a toner cartridge | Emerging Cross-Sectional Technologies | 16 | Expired |
| US5245390A | Device for adjusting output of image density sensor incorporated in image forming equipment | Physics | 13 | Expired |
| US5184184A | Image forming apparatus | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4963938A | Toner cartridge for an image forming apparatus | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5265855A | Copier with document support moving means | Performing Operations; Transporting | 7 | Expired |
| US5045883A | Image density control method using exclusive patterns for an image forming apparatus | Physics | 7 | Expired |
| US5258248A | Image density control method for an image forming apparatus | Physics | 7 | Expired |
| US5122837A | Toner cartridge for an image forming apparatus | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5321466A | Image forming equipment with reserve mode to prevent unauthorized cancellation of pending job | Performing Operations; Transporting | 4 | Expired |
| US5028960A | Image density control method for an image forming apparatus | Physics | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.