Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7976166 | Optical system for image projection and image projection apparatus including a polarization beam splitting surface | Atsushi Okuyama, Yu Yamauchi, Takashi Sudo | 2011-07-12 |
| 7878659 | Illumination optical system and projection-type image display apparatus using the same | Yu Yamauchi | 2011-02-01 |