Tomohiro Nakajima
95Patents
22h-index
58Co-inventors
91Inventor score
Filing activity: Nov 28, 1986 → Nov 19, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5936756A | Compact scanning optical system | Physics | 103 | Expired |
| US5999345A | Multi-beam light source unit | Electricity | 86 | Expired |
| US5786594A | Multi-beam pitch adjustment system and method | Electricity | 76 | Expired |
| US6657765B2 | Optical deflecting unit, optical scanning unit, image forming apparatus, and method of producing optical unit | Physics | 64 | Expired |
| US6621512B2 | Multi-beam light source device and multi-beam scanning apparatus using the same | Physics | 59 | Expired |
| US6400917B2 | Image forming apparatus for reducing banding caused by vibration of stacked image forming cartridges | Physics | 50 | Expired |
| US6052211A | Compact multiple-beam scanning optical system | Electricity | 45 | Expired |
| US6236820A | Image forming apparatus for reducing banding caused by vibration of stacked image forming cartridges | Physics | 42 | Expired |
| US7068296B2 | Optical scanning device for reducing a dot position displacement at a joint of scanning lines | Physics | 41 | Expired |
| US5633744A | Supporting apparatus for optical scanning apparatus | Physics | 40 | Expired |
| US5753907A | Multiple beam scanning apparatus | Electricity | 37 | Expired |
| US4853710A | Imaging by laser beam scanning | Electricity | 32 | Expired |
| US7532227B2 | Optical scanner and image forming apparatus | Electricity | 31 | Expired |
| US6972883B2 | Vibration mirror, optical scanning device, and image forming using the same, method for making the same, and method for scanning image | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5793408A | Optical scanning apparatus with improved structure for adjusting focus position | Physics | 29 | Expired |
| US6091534A | Compact scanning optical system | Physics | 29 | Expired |
| US6839157B2 | Method and apparatus for multi-beam optical scanning capable of effectively adjusting a scanning line pitch | Electricity | 27 | Expired |
| US5671077A | Multi-beam light source device and optical scanning apparatus using the multi-beam source device | Performing Operations; Transporting | 25 | Expired |
| US7411712B2 | Optical scanner and image formation apparatus | Physics | 23 | Expired |
| US7333254B2 | Optical scanning apparatus, illuminant apparatus and image forming apparatus | Physics | 23 | Expired |
| US6466754B2 | Image forming apparatus for reducing banding caused by vibration of stacked image forming cartridges | Physics | 22 | Expired |
| US6932271B2 | Optical scan module, optical scanner, optical scan method, image generator and image reader | Physics | 22 | Expired |
| US6995885B2 | Vibrating mirror, optical scanner using vibrating mirror, and image reproducing and forming apparatus | Electricity | 22 | Expired |
| US6775041B1 | Multibeam scanning apparatus | Physics | 21 | Expired |
| US4953171A | Semiconductor laser source unit | Electricity | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.