Takuya Oka
29Patents
3h-index
50Co-inventors
66Inventor score
Filing activity: Dec 16, 1996 → Jul 1, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5691525A | Data transfer system and data transfer terminal device | Physics | 83 | Expired |
| US5969332A | System for issuing and utilizing ticket | Physics | 10 | Expired |
| US6772953B2 | Contactless data carrier | Electricity | 4 | Expired |
| US8906234B2 | Filter device | Physics | 2 | Active |
| US9866009B2 | Protection circuit | Electricity | 2 | Active |
| US11372348B2 | Developing device, cartridge, image forming apparatus | Physics | 1 | Active |
| US8702930B2 | Sensor chip and storage method thereof | Emerging Cross-Sectional Technologies | 1 | Active |
| US8557195B2 | Sensor substrate and array substrate using the same | Emerging Cross-Sectional Technologies | 1 | Active |
| US10877395B2 | Developing device, process cartridge and image forming apparatus | Physics | 1 | Active |
| US10976685B2 | Image forming apparatus to perform an activation control using a developing bias applying member and a speed control unit | Physics | 0 | Active |
| US10243516B2 | Audio amplifier and audio power amplifier | Electricity | 0 | Active |
| US12321108B2 | Image forming apparatus | Physics | 0 | Active |
| US11099503B2 | Image forming apparatus | Physics | 0 | Active |
| US11693335B2 | Development cartridge | Physics | 0 | Active |
| US10852662B2 | Developing device, process cartridge and image forming apparatus | Physics | 0 | Active |
| US11835888B2 | Developing device, cartridge, image forming apparatus | Physics | 0 | Active |
| US11450917B2 | Power storage device | Emerging Cross-Sectional Technologies | 0 | Active |
| US10893763B2 | Plate with inclined surface | Human Necessities | 0 | Active |
| US11300900B2 | Development cartridge | Physics | 0 | Active |
| US10781288B2 | Polyimide precursor and polyimide | Chemistry; Metallurgy | 0 | Active |
| US9758623B2 | Polyimide precursor and polyimide | Emerging Cross-Sectional Technologies | 0 | Active |
| US10761453B2 | Developing device, process cartridge, and image forming apparatus | Physics | 0 | Active |
| US11073788B2 | Process cartridge providing fixation layer to developer on image bearing member and image forming apparatus | Physics | 0 | Active |
| US11860565B2 | Restricting member, developing device, process cartridge, and image forming apparatus | Physics | 0 | Active |
| US10174166B2 | Polyimide precursor, polyimide, varnish, polyimide film, and substrate | Chemistry; Metallurgy | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.