Nobuo Sakuma
45Patents
16h-index
35Co-inventors
81Inventor score
Filing activity: Aug 5, 1975 → Mar 17, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5606181A | Edge emitting type light emitting diode array heads | Electricity | 136 | Expired |
| US7048388B2 | Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus | Physics | 84 | Expired |
| US5005928A | Optical scanning system | Physics | 45 | Expired |
| US6292305A | Virtual screen display device | Physics | 43 | Expired |
| US5408095A | Optical scanner having an image forming mirror and means for reducing scanning line pitch irregularities | Electricity | 43 | Expired |
| US5233454A | Image forming reflecting mirror for constant speed optical scan and optical scanner | Physics | 42 | Expired |
| US5426298A | Optical scanner | Physics | 32 | Expired |
| US4934772A | Light beam scanning lens and light beam scanning device | Physics | 30 | Expired |
| US4712884A | Lens system for deflected light beam | Physics | 27 | Expired |
| US3982116A | Slit illumination system for copying machine | Physics | 26 | Expired |
| US4571035A | Two-element f.theta. lens group capable of correcting leaning of deflecting plane | Physics | 23 | Expired |
| US5128795A | Scanning lens and scanning apparatus using scanning lens | Electricity | 23 | Expired |
| US4953171A | Semiconductor laser source unit | Electricity | 21 | Expired |
| US4932734A | Optical scanning system using a laser diode array | Physics | 20 | Expired |
| US7441908B2 | Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus | Physics | 19 | Expired |
| US4756585A | Optical beam scanning system | Physics | 18 | Expired |
| US4955682A | Scanning optical system | Physics | 16 | Expired |
| US7631975B2 | Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus | Physics | 16 | Active |
| US5170278A | Return optical deflecting element, optical deflecting element and optical scanner | Physics | 15 | Expired |
| US4695132A | F.theta. single lens | Performing Operations; Transporting | 15 | Expired |
| US7637621B2 | Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus | Physics | 15 | Active |
| US4707085A | F.theta. lens for use in light beam scanner | Physics | 14 | Expired |
| US6545803B1 | Virtual screen display device | Physics | 13 | Expired |
| US4770517A | Two-lens f.theta. lens | Physics | 13 | Expired |
| US4943128A | Light scanning device | Electricity | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.