Yoshinori Hayashi
208Patents
32h-index
190Co-inventors
93Inventor score
Filing activity: Jul 23, 1979 → Jan 17, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6081386A | Optical scanning lens, optical scanning and imaging system and optical scanning apparatus incorporating same | Physics | 100 | Expired |
| US5875051A | Optical scanning device and a scanning lens therefor | Physics | 84 | Expired |
| US6400391B1 | Optical scanning lens, optical scanning device and image forming apparatus | Emerging Cross-Sectional Technologies | 82 | Expired |
| US6069724A | Optical scanning lens and optical scanning apparatus | Physics | 80 | Expired |
| US6185026A | Multi-beam scanning apparatus | Physics | 71 | Expired |
| US4983916A | Compact magnetic encoder | Physics | 67 | Expired |
| US6198562A | Multi-beam scanning device and image forming system and method using the same | Physics | 67 | Expired |
| US6104522A | Optical scanning apparatus with controlled sag and ghost | Physics | 64 | Expired |
| US6657765B2 | Optical deflecting unit, optical scanning unit, image forming apparatus, and method of producing optical unit | Physics | 64 | Expired |
| US5986791A | Optical scanning device and a scanning lens therefor | Physics | 58 | Expired |
| US6462853B2 | Optical scanning device | Physics | 55 | Expired |
| US5570224A | Optical scanning apparatus | Physics | 54 | Expired |
| US7218432B2 | Optical scanning apparatus and image forming apparatus | Electricity | 51 | Active |
| US6222662A | Optical scanning device and a scanning lens therefor | Emerging Cross-Sectional Technologies | 49 | Expired |
| US7271824B2 | Pixel clock generating apparatus, optical writing apparatus using a pixel clock, imaging apparatus, and method for generating pixel clocks | Electricity | 48 | Expired |
| US6771407B2 | Optical scanner and image formation apparatus | Physics | 47 | Expired |
| US5557448A | Optical scanner | Physics | 45 | Expired |
| US6141133A | Optical scanning device and a scanning lens therefor | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5652670A | Scanning image forming lens and optical scanner | Physics | 42 | Expired |
| US6317246A | Multi-beam scanning apparatus | Physics | 41 | Expired |
| US5581392A | Optical Scanner | Physics | 41 | Expired |
| US7068296B2 | Optical scanning device for reducing a dot position displacement at a joint of scanning lines | Physics | 41 | Expired |
| US7106483B2 | Optical scanner and image forming apparatus | Physics | 40 | Expired |
| US7006120B2 | Multi-beam optical scanning apparatus and image forming apparatus | Performing Operations; Transporting | 39 | Expired |
| US6906739B2 | Optical scanner and imaging apparatus using the same | Electricity | 39 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.