Takehiro Koyama
14Patents
2h-index
8Co-inventors
43Inventor score
Filing activity: May 23, 2002 → Apr 18, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6736513B2 | Projection type image display apparatus | Electricity | 10 | Expired |
| US6919992B2 | Color separating-combining optical system, image display optical system, and projection image display apparatus | Electricity | 4 | Expired |
| US9091910B2 | Image projector | Electricity | 2 | Active |
| US7868963B2 | Optical modulation element unit, projection optical unit, and image projection apparatus | Physics | 2 | Active |
| US7158308B2 | Color separating-combining optical system, image display optical system, and projection image display apparatus | Electricity | 1 | Expired |
| US8044898B2 | LED display apparatus having a column and row controller | Physics | 1 | Active |
| US7961269B2 | Optical modulation element unit, projection optical unit, and image projection apparatus | Physics | 1 | Active |
| USD854656S1 | Fluid controller | General | 1 | Active |
| US9726884B2 | Displaying apparatus unit and projection type displaying apparatus | Electricity | 0 | Active |
| US8233227B2 | Prism unit and a projection image display apparatus | Physics | 0 | Active |
| US8724241B2 | Prism unit and a projection image display apparatus | Physics | 0 | Active |
| US8888293B2 | Image projection apparatus having an insertable and extractable optical element | Electricity | 0 | Active |
| US10620513B2 | Projection type display apparatus | Physics | 0 | Active |
| US9618831B2 | Image projector | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.