Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8040781 | Wavelength selecting wavelength plate and optical head device using it | Yukihiro Tao, Atsushi Koyanagi, Koji Miyasaka | 2011-10-18 |
| 8040782 | Wavelength-selective light-shielding element and optical head using the same | — | 2011-10-18 |