Takeshi Sumikawa
15Patents
8h-index
26Co-inventors
72Inventor score
Filing activity: Nov 17, 1987 → Jun 28, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5768666A | Developing apparatus comprising excessive toner separation means | Physics | 17 | Expired |
| US4833505A | Latent image color developing system | Physics | 14 | Expired |
| US4937629A | Composite image recording apparatus | Physics | 10 | Expired |
| US5126795A | Image recording method | Physics | 10 | Expired |
| US5212525A | Developing magnetic roller having repulsive magnetic poles and developer-limiting member | Physics | 9 | Expired |
| US5418097A | Color image recording method and apparatus | Physics | 8 | Expired |
| US5655191A | Color image recording method for transferring a multi-colored image to an image receptor | Physics | 8 | Expired |
| US5181072A | Color recording apparatus | Physics | 8 | Expired |
| US5532804A | Device for developing an electrostatic image on an image member | Physics | 7 | Expired |
| US5406313A | Color image forming apparatus and method | Physics | 6 | Expired |
| US5469245A | Development method and apparatus and multicolor image forming apparatus using these | Physics | 5 | Expired |
| US5752139A | Dual-component magnetic brush developing device | Physics | 4 | Expired |
| US4882247A | Electrophotographic image recording method | Physics | 3 | Expired |
| US6650853B1 | Image recording apparatus and method with improved image transfer characteristics | Physics | 2 | Expired |
| US11781884B2 | Tire proposal system | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.