Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6501601 | Optical device with diffraction grating having plural grating regions | Shoichi Takasuka, Hideyuki Nakanishi, Akio Yoshikawa, Naoki Nakanishi | 2002-12-31 |
| 6473248 | Method for manufacturing an optical pickup | Hideyuki Nakanishi, Shoichi Takasuka, Akio Yoshikawa, Kazutoshi Onozawa, Kazuhiko Yamanaka +1 more | 2002-10-29 |