Fumito Nonaka
33Patents
14h-index
53Co-inventors
84Inventor score
Filing activity: Jul 21, 1997 → Mar 30, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6826380B2 | Information storing medium, unit, process cartridge, developing cartridge, and electrophotographic image forming apparatus | Physics | 76 | Expired |
| US7082276B2 | Information storing medium, unit, process cartridge, developing cartridge, and electrophotographic image forming apparatus | Physics | 74 | Expired |
| US5937237A | Seal member, toner container and process cartridge | Physics | 68 | Expired |
| US6101348A | Developing unit, process cartridge and electrophotographic image forming apparatus | Physics | 63 | Expired |
| US6922534B2 | Process cartridge and electrophotographic image forming apparatus having electrical connection for memory | Physics | 51 | Expired |
| US8879954B2 | Cartridge with member for fixing a member-to-be-energized | Physics | 31 | Active |
| US7865115B2 | Process cartridge, electrophotographic image forming apparatus, method of manufacturing a process cartridge, and method of remanufacturing a process cartridge | Physics | 27 | Active |
| US8909096B2 | Developing device, process cartridge and drum unit | Physics | 26 | Active |
| US9188940B2 | Developing device, process cartridge and drum unit | Physics | 24 | Active |
| US9128417B2 | Unit and image forming apparatus | Physics | 22 | Active |
| USD583860S1 | Toner cartridge | General | 19 | Expired |
| USD622309S1 | Process cartridge | General | 19 | Expired |
| US9377716B2 | Unit and image forming apparatus | Physics | 16 | Active |
| USD622308S1 | Process cartridge | General | 15 | Expired |
| US6356730B1 | Developing apparatus and cleaning apparatus | Physics | 12 | Expired |
| USD585482S1 | Toner cartridge | General | 10 | Expired |
| US9280135B2 | Process cartridge and image forming apparatus | Physics | 4 | Active |
| US9529306B2 | Cartridge and unit with injection molded seal member | Physics | 3 | Active |
| US9002233B2 | Process cartridge unit | Physics | 2 | Active |
| US10175599B2 | Rotating member, process cartridge, and image forming apparatus | Physics | 1 | Active |
| US10185251B2 | Reproduction method for developing device | Physics | 1 | Active |
| US9146526B2 | Unit, cleaning unit, process cartridge, and image forming apparatus | Physics | 1 | Active |
| US9069291B2 | Cartridge and unit, for use with an image bearing member, having a seal member that seals a gap between a blade member and a frame | Physics | 1 | Active |
| US9996020B2 | Roller, rotating member unit, cartridge, and image forming apparatus | Physics | 0 | Active |
| US9348264B2 | Unit, cleaning unit, process cartridge, and image forming apparatus | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.