Yuji Arai
204Patents
22h-index
212Co-inventors
93Inventor score
Filing activity: Nov 23, 1976 → Aug 13, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7072602B2 | Image forming apparatus and image forming unit | Physics | 96 | Expired |
| US7321744B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 89 | Expired |
| US7480476B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 86 | Active |
| US7519317B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 62 | Active |
| US5090009A | Optical information recording medium | Physics | 60 | Expired |
| US4940618A | Optical information recording medium | Emerging Cross-Sectional Technologies | 59 | Expired |
| US8005406B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 59 | Active |
| US7835673B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 56 | Active |
| US7697870B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 53 | Active |
| US6937838B2 | Waste toner collecting device, and image forming apparatus including the waste toner collecting device | Physics | 52 | Expired |
| US5705247A | Optical information medium and method for fabricating the same | Emerging Cross-Sectional Technologies | 48 | Expired |
| US8195070B2 | Developer container, developer supplying device, and image forming apparatus | Emerging Cross-Sectional Technologies | 47 | Active |
| US4990388A | Optical information recording medium | Emerging Cross-Sectional Technologies | 35 | Expired |
| US7076192B2 | Powder conveying device and image forming apparatus using the same | Emerging Cross-Sectional Technologies | 31 | Expired |
| US7162189B2 | Method and apparatus of image forming and process cartridge included in the apparatus | Physics | 30 | Expired |
| US7024133B2 | Image forming apparatus using a user installable process cartridge, a method of arranging the process cartridge, and the process cartridge itself | Physics | 30 | Expired |
| US7398038B2 | Image forming apparatus using a toner container and a process cartridge | Physics | 29 | Expired |
| US6615013B2 | Powder classifying device and image forming apparatus having the powder classifying device | Physics | 29 | Expired |
| US5009818A | Method of manufacturing an optical information recorded disc | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4095253A | Single in-line high power resin-packaged semiconductor device having an improved heat dissipator | Electricity | 25 | Expired |
| US7136610B2 | Image forming apparatus using installable process cartridge, method of positioning process cartridge, and process cartridge itself | Physics | 23 | Expired |
| US6975830B2 | Image forming apparatus, process cartridge, and waste toner recovery device | Physics | 22 | Expired |
| US8317946B2 | Seamless steel pipe and method for manufacturing the same | Chemistry; Metallurgy | 22 | Active |
| US5155723A | Optical information recording method and medium | Physics | 21 | Expired |
| US5020048A | Optical information recording medium having a protective film which can be stripped | Physics | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.