Masumi Sato
57Patents
20h-index
73Co-inventors
87Inventor score
Filing activity: Oct 9, 1990 → Aug 17, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6507720B2 | Color image forming apparatus and toner replenishing apparatus each including plural toner containers received in receiving member of setting part and toner containers therefor | Physics | 120 | Expired |
| US6393241B1 | Nozzle having an end portion capable of penetrating into a toner discharging portion included in a toner container that stores powdery toner | Performing Operations; Transporting | 111 | Expired |
| US6628908B2 | Toner supply unit and image forming apparatus | Emerging Cross-Sectional Technologies | 93 | Expired |
| US6591077B2 | Image forming apparatus and toner container therefor | Physics | 82 | Expired |
| US6501913B2 | Container, its support structure, and image formation apparatus | Physics | 66 | Expired |
| US5400123A | Image forming apparatus capable of erasing an image recorded in a sheet | Physics | 63 | Expired |
| US6505022B2 | Image forming apparatus having protective layer on the surface of image bearing member to avoid adhesion of film of additives to image bearing member | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6567637B2 | Apparatus and method for replenishing a developing device with toner while suppressing toner remaining | Emerging Cross-Sectional Technologies | 59 | Expired |
| US5878317A | Electrophotographic method and apparatus including a toner recycle feature | Physics | 49 | Expired |
| US5799229A | Toner spreading device for a charging roller of an image forming apparatus | Physics | 42 | Expired |
| US6546219B2 | Method and apparatus for performing a charging process on an image carrying device | Emerging Cross-Sectional Technologies | 35 | Expired |
| US5659843A | Image transferring device for image forming equipment | Physics | 35 | Expired |
| US6470161B2 | Apparatus for minimizing toner contamination on an image formation member | Physics | 34 | Expired |
| US6898407B2 | Desktop color image forming apparatus and method of making the same | Physics | 34 | Expired |
| US6334039A | Method and apparatus for image forming apparatus capable of accurately detecting toner image patterns | Physics | 32 | Expired |
| US5946529A | Image forming apparatus using a roller type charging system | Physics | 29 | Expired |
| US6366754B1 | Color image forming apparatus with toner recycling | Physics | 28 | Expired |
| US6748190B2 | Apparatus and method for replenishing a developing device with toner while suppressing toner remaining | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6519428B1 | Image forming apparatus having mixed toner consumption mode | Physics | 22 | Expired |
| US6719469B2 | Ink jet recording apparatus capable of performing a duplex print operation | Performing Operations; Transporting | 21 | Expired |
| US7130558B2 | Toner supply unit and image forming apparatus | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6567643B2 | Apparatuses for color image formation, tandem color image formation and image formation | Physics | 19 | Expired |
| US6416176B1 | Ink-jet printing system having an improved sheet transport mechanism | Performing Operations; Transporting | 17 | Expired |
| US5144337A | Image forming apparatus capable of forming an image by dots having various diameters | Electricity | 14 | Expired |
| US5719684A | Image forming apparatus having an endless conveying and transferring belt with an interrupt control | Physics | 14 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.