Masahiko Yatsu
147Patents
12h-index
91Co-inventors
89Inventor score
Filing activity: Apr 17, 1990 → May 23, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6290360A | Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same | Physics | 32 | Expired |
| US6573950B1 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Electricity | 25 | Expired |
| US6062695A | Projection type liquid crystal display device | Electricity | 25 | Expired |
| US7255444B2 | Optical unit and projection-type image display apparatus using the same | Physics | 18 | Expired |
| US5748238A | Video camera | Electricity | 17 | Expired |
| US6560041B2 | Projection lens apparatus and projection type image display apparatus | Physics | 16 | Expired |
| US6956624B2 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Electricity | 15 | Expired |
| US8313199B2 | Projection display system including lens group and reflecting mirror | Physics | 15 | Active |
| US6894729B2 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Electricity | 14 | Expired |
| US7081927B2 | Optical projection apparatus, transmission type screen, and projection type image display apparatus | Electricity | 13 | Expired |
| US6201645A | Array lens, lighting optical system, optical unit and imaging apparatus | Electricity | 13 | Expired |
| USD639076S1 | Mirror for projector | General | 13 | Expired |
| US6411440B1 | Array lens, lighting optical system, optical unit and imaging apparatus | Electricity | 12 | Expired |
| US7410264B2 | Image display apparatus forming optical image by irradiating light from light source onto image display element | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7232227B2 | Image display device | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6783245B2 | Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same | Physics | 9 | Expired |
| US6416182B1 | Projection type liquid crystal display device | Electricity | 9 | Expired |
| US7467872B2 | Projection optical unit and projection type video display device using the unit | Physics | 9 | Active |
| US10100995B2 | Vehicular lighting apparatus | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US5565919A | Video camera/VTR and camera station with opto-electronic link between camera/VTR and camera station | Electricity | 8 | Expired |
| US7766488B2 | Projection type image display apparatus | Electricity | 7 | Active |
| US5048939A | Zoom lens system | Physics | 7 | Expired |
| US7914153B2 | Projection type image display apparatus | Electricity | 6 | Active |
| US6783242B1 | Projection apparatus and projection-type image display apparatus | Electricity | 6 | Expired |
| US8690349B2 | Oblique projection optical system and projection type display apparatus using the same | Emerging Cross-Sectional Technologies | 6 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.