Katsumi Kumada
15Patents
6h-index
44Co-inventors
66Inventor score
Filing activity: Jul 29, 1991 → Aug 12, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6094549A | Electrograph apparatus enabling removal of offensive substances | Physics | 36 | Expired |
| US7804628B2 | Image forming apparatus with an open-close regulation mechanism of the automatic document feeder | Electricity | 21 | Active |
| US5345301A | Image fixing device and electrophotographic apparatus incorporated with such device | Physics | 16 | Expired |
| US8131197B2 | Fixing device and electro photographic apparatus using the same | Physics | 15 | Active |
| US5491537A | Developing apparatus having developing agent accommodating cartridge and cartridge for accommodating developing agent for use in developing apparatus | Physics | 11 | Expired |
| US6400923B1 | Fixing device improved in offset-prevention | Physics | 6 | Expired |
| US7758040B2 | Sheet feed cassette and image forming apparatus using the same | Performing Operations; Transporting | 5 | Active |
| US8073375B2 | Fixing unit and image forming apparatus having the same | Physics | 4 | Active |
| US6661994B2 | Electrophotographic image forming system | Physics | 4 | Expired |
| US7970311B2 | Developing device and image forming apparatus using the same | Physics | 3 | Active |
| US7570898B2 | Image forming apparatus including a wiring housing member | Electricity | 3 | Active |
| US5604572A | Developing apparatus having developing agent accommodating cartridge and cartridge for accommodating developing agent for use in developing apparatus | Physics | 3 | Expired |
| US8417155B2 | Swing-gear mechanism and image forming apparatus having multiple speed modes | Emerging Cross-Sectional Technologies | 2 | Active |
| US7983596B2 | Housing structure and image forming apparatus | Physics | 1 | Active |
| US7925193B2 | Rotary member, developing device, and image forming apparatus | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.