Yohta Sakon
59Patents
20h-index
65Co-inventors
91Inventor score
Filing activity: Apr 19, 1990 → Mar 17, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5077142A | Electroluminescent devices | Emerging Cross-Sectional Technologies | 153 | Expired |
| US6030733A | Electrophotographic photoconductor with water vapor permeability | Physics | 75 | Expired |
| US5420288A | Electroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compounds | Electricity | 62 | Expired |
| US6060205A | Image forming apparatus | Physics | 61 | Expired |
| US5656401A | Electroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compounds | Electricity | 58 | Expired |
| US5597925A | Method of producing oxadiazole compounds | Electricity | 55 | Expired |
| US5610309A | Electroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compounds | Electricity | 53 | Expired |
| US6151468A | Electrophotographic photoconductor | Physics | 53 | Expired |
| US5153073A | Electroluminescent device | Emerging Cross-Sectional Technologies | 52 | Expired |
| US6562529B1 | Electrophotographic drum-shaped photoconductor and image forming method and apparatus using the same | Physics | 45 | Expired |
| US6363237B1 | Unit for imparting lubricity to electrophotographic photoconductor, electrophotographic image formation apparatus including the unit, and image formation method using the apparatus | Physics | 45 | Expired |
| US6160977A | Image forming apparatus and device for applying a lubricant to an image | Physics | 40 | Expired |
| US6641964B2 | Electrophotographic photoreceptor, method for manufacturing the photoreceptor, and image forming method and apparatus using the photoreceptor | Physics | 39 | Expired |
| US6558862B2 | Electrophotographic photoreceptor and image forming apparatus using the photoreceptor | Physics | 37 | Expired |
| US6521386B1 | Electrophotographic photoreceptor and electrophotographic image forming method and apparatus using the photoreceptor | Physics | 35 | Expired |
| US6576388B2 | Multilayer electrophotographic photoreceptor, and image forming method, image forming apparatus and process cartridge using the photoreceptor | Physics | 33 | Expired |
| US5932362A | Organic electroluminescent element | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5702833A | Organic electroluminescent element | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5118986A | Electroluminescent device | Electricity | 23 | Expired |
| US6686114B2 | Electrophotographic image forming method and apparatus | Physics | 22 | Expired |
| US5093210A | Electroluminescent device | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6516169B2 | Electrophotographic image forming apparatus having a gap between photoreceptor and charger, and process cartridge therefor | Physics | 15 | Expired |
| US6844124B2 | Electrophotographic photoreceptor, method for manufacturing the photoreceptor, and image forming method and apparatus using the photoreceptor | Physics | 15 | Expired |
| US6706459B2 | Electrophotographic drum-shaped photoconductor and image forming method and apparatus using the same | Physics | 11 | Expired |
| US8369769B2 | Cleaning blade, image forming apparatus, and process cartridge | Physics | 5 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.