Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5391865 | Optical pickup apparatus and optical grating assembly therefor | Yukio Kurata, Hiroshi Ogata, Mitsuharu Tomura, Shigeki Tsuji | 1995-02-21 |
| 5049733 | Semiconductor chip detecting device for providing focusing and reproduction signals | Koji Yoshifusa, Taizo Yokota | 1991-09-17 |
| 5048000 | Optical information reading apparatus comprising a diffraction grating member having first and second portions | Shigeki Tsuji | 1991-09-10 |
| 4969715 | Device for supporting object lens in optical head | Hiroshi Ogata, Tatsuhiro Yoshimune, Kaoru Nishimura | 1990-11-13 |