Junya Hirayama
35Patents
3h-index
15Co-inventors
60Inventor score
Filing activity: Aug 28, 1990 → Jul 20, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6461512B1 | Method of disinfecting a deionized water producing apparatus and method of producing deionized water | Chemistry; Metallurgy | 27 | Expired |
| US5132196A | Photosensitive member having a colored aluminum oxide layer | Physics | 8 | Expired |
| US7761041B2 | Developing apparatus, image forming apparatus and method for forming image using opposite polarity particles | Physics | 3 | Active |
| US8892019B2 | Image forming apparatus and gloss control method | Physics | 3 | Active |
| US8126378B2 | Developing device and image forming apparatus with a toner separation member that uses a bias voltage to pull away toner in a developer | Physics | 2 | Active |
| US8131191B2 | Image forming apparatus and method for developing electrostatic latent image | Physics | 2 | Active |
| US7968267B2 | Method for developing an electrostatic latent image | Physics | 2 | Active |
| US7263320B2 | Image forming apparatus, developing apparatus, and finely-divided toner particle collecting apparatus | Physics | 1 | Expired |
| US7761040B2 | Image forming apparatus having developer with opposite polarity particles | Physics | 1 | Active |
| US7689150B2 | Image forming apparatus using trapezoidal shaped electric field and method for forming image | Physics | 1 | Active |
| US7986892B2 | Image forming apparatus having a controller for controlling a developer | Physics | 1 | Active |
| US7734227B2 | Developing device and image-forming apparatus using multiple-component developer | Physics | 1 | Active |
| US7738814B2 | Development apparatus, image-forming apparatus and developing method using reverse polarity particles | Physics | 1 | Active |
| US8095026B2 | Developing device and image forming apparatus | Physics | 1 | Active |
| US7697873B2 | Development apparatus, image forming apparatus and developing method that employ a magnetic brush | Physics | 1 | Active |
| US9429890B2 | Fixing device, image forming apparatus and fixing method | Physics | 0 | Active |
| US9316960B2 | Fixing device | Physics | 0 | Active |
| US8331835B2 | Developing device and image forming apparatus with developer including toner, carrier, and reverse polarity particles | Physics | 0 | Active |
| US8867950B2 | Wet-type image forming apparatus | Physics | 0 | Active |
| US8335445B2 | Development apparatus and image forming apparatus | Physics | 0 | Active |
| US9316953B2 | Wet-type image formation apparatus and a charging device for charging a recording medium, and method | Physics | 0 | Active |
| US7653335B2 | Developing apparatus and image forming apparatus | Physics | 0 | Active |
| US8489004B2 | Developer device and image forming apparatus | Physics | 0 | Active |
| US9195181B2 | Image forming apparatus and image forming method for forming an image on recording media with different gloss levels | Physics | 0 | Active |
| US7949284B2 | Image forming apparatus | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.