Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6501876 | Bidirectional optical communication device and bidirectional optical communication apparatus | Kuniaki Okada, Yorishige Ishii, Toshiyuki Matsushima, Hideaki Fujita | 2002-12-31 |
| 6487015 | Diffraction grating having multiple gratings with different cycles for generating multiple beams and optical pickup using such diffraction grating | Kazuya Kitamura, Takeshi Yamaguchi, Tetsuo Ueyama | 2002-11-26 |
| 6438089 | Optical pickup device | Kazuya Kitamura, Tetsuo Iwaki | 2002-08-20 |
| 6388822 | Optical pickup device and optical recording medium | Kazuya Kitamura, Tetsuo Iwaki | 2002-05-14 |