Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6917576 | Retarder and optical head device installing the same | Takehiko Nishiyama, Naomitsu Umemura, Hiromasa Sato, Masahiro Murakawa, Yuzuru Tanabe | 2005-07-12 |
| 6891147 | Wavelength-selective diffraction element and an optical head device | Ryuichiro Goto, Hiroki Hotaka, Reiko Nozawa, Noriaki Shimodaira, Ryota Murakami | 2005-05-10 |