Kazukiyo Nagai
107Patents
25h-index
86Co-inventors
93Inventor score
Filing activity: Aug 23, 1989 → Jan 8, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5350459A | Organic photovoltaic element | Emerging Cross-Sectional Technologies | 65 | Expired |
| US5420288A | Electroluminescent device comprising oxadiazole compounds luminescent material, oxadiazole compounds for the device, and method of producing oxadiazole compounds | Electricity | 62 | 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 |
| US6210848A | Electrophotographic photoconductor, and process cartridge and image forming apparatus using the same | Physics | 53 | Expired |
| US6444387B2 | Image bearing material, electrophotographic photoreceptor using the image bearing material, and image forming apparatus using the photoreceptor | Physics | 50 | Expired |
| US5789128A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 50 | Expired |
| US5942363A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 49 | Expired |
| US6187492A | Electrophotographic photoconductor and method of producing aromatic polycarbonate resin for use in the photoconductor | Chemistry; Metallurgy | 48 | Expired |
| US6492079B2 | Electrophotographic photoconductor, image forming apparatus, and process cartridge using the photoconductor | Physics | 48 | Expired |
| US5846680A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 47 | Expired |
| US6191249A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 41 | Expired |
| US5840454A | Aromatic polycarbonate and electrophotographic photosensitive medium using same | Physics | 40 | Expired |
| US5723243A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 40 | Expired |
| US6548216B2 | ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, IMAGE FORMING METHOD AND APPARATUS, AND PROCESS CARTRIDGE USING THE PHOTOCONDUCTOR, AND LONG-CHAIN ALKYL GROUP CONTAINING BISPHENOL COMPOUND AND POLYMER MADE THEREFROM | Physics | 38 | Expired |
| US8192904B2 | Electrophotographic photoconductor, and image forming apparatus and process cartridge using the same | Physics | 37 | Active |
| US5910561A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 37 | Expired |
| US6899983B2 | Electrophotographic photoconductor, electrophotographic apparatus and process cartridge | Physics | 35 | Expired |
| US6187494A | Electrophotographic photoconductor and aromatic polycarbonate resin for use in the photoconductor | Physics | 35 | Expired |
| US6069224A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 34 | Expired |
| US6027846A | Electrophotographic photoconductor and aromatic polycarbonate resin for use therein | Physics | 31 | Expired |
| US6936388B2 | Electrophotographic photoreceptor, and image forming method, image forming apparatus, and image forming apparatus processing unit using same | Physics | 27 | Expired |
| US5702833A | Organic electroluminescent element | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5932362A | Organic electroluminescent element | Emerging Cross-Sectional Technologies | 25 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.