Shunji Katoh
46Patents
14h-index
75Co-inventors
84Inventor score
Filing activity: Oct 6, 1980 → Apr 27, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6337957B1 | Image forming apparatus and developing device with improved self toner density control | Physics | 118 | Expired |
| US6522855B1 | Image forming apparatus and developing apparatus preventing uneven image density | Physics | 91 | Expired |
| US6198895A | Developing device with improved developer circulation and toner density control | Physics | 77 | Expired |
| US6091912A | Tower supplying device and image forming apparatus using same toner supplying device | Physics | 57 | Expired |
| US5950055A | Powder pump and image forming apparatus having the powder pump and method therefor | Physics | 51 | Expired |
| US5950062A | Toner sorting device for separating reusable toner from used toner and image forming apparatus using the same device | Physics | 48 | Expired |
| US6151471A | Toner supplying device, method and image forming apparatus using the same toner supplying device or method | Physics | 37 | Expired |
| US6859634B2 | Toner refilling device and developing device using the same for an image forming apparatus | Physics | 36 | Expired |
| US4922301A | Rotary multicolor developing apparatus | Physics | 35 | Expired |
| US6097903A | Toner supplying device, toner container therefor and image forming apparatus using same toner supplying device and toner container | Physics | 35 | Expired |
| US5182601A | Image forming apparatus having toner handling units which are alternatively usable as a developing device or a cleaning device | Physics | 28 | Expired |
| US4885223A | Method and apparatus for developing electrostatic latent image | Physics | 21 | Expired |
| US4733267A | Apparatus for developing electrostatic latent image | Physics | 18 | Expired |
| US4987449A | Method of sensing a remaining amount of developer for a color image forming apparatus | Physics | 16 | Expired |
| US7599650B2 | Developer bearing member, developing device, process cartridge and image forming apparatus | Physics | 14 | Active |
| US5227847A | Image forming equipment with supplemental developer detecting device | Physics | 14 | Expired |
| US4384785A | Charge quenching apparatus for electrophotographic copying machine | Physics | 11 | Expired |
| US9465317B2 | Nozzle insertion member, powder container, and image forming apparatus | Physics | 6 | Active |
| US8781375B2 | Powder container, powder conveying apparatus, and image forming apparatus | Physics | 5 | Active |
| US9152084B2 | Toner housing container and image forming apparatus | Physics | 5 | Active |
| US9069288B2 | Toner housing container and image forming apparatus | Physics | 5 | Active |
| US9057984B2 | Powder container, toner cartridge, drawer tray, and image forming apparatus | Physics | 4 | Active |
| US9423720B2 | Powder container and image forming apparatus | Physics | 2 | Active |
| US9348259B2 | Toner housing container and image forming apparatus | Physics | 2 | Active |
| US9261817B2 | Replenishing developer housing container and image forming apparatus | Physics | 2 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.