Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8068388 | Optical pick up and optical disc device having optical shield for suppressing the influence of stray light through hologram element | Yasuo Ueda, Yasumasa Shibata, Hiroshi Tajika, Hiroaki Takahashi | 2011-11-29 |