Issued Patents 2005
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6947213 | Diffractive optical element that polarizes light and an optical pickup using the same | Hideyuki Nakanishi, Shoichi Takasuka, Akio Yoshikawa, Teruhiro Shiono | 2005-09-20 |