Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5283690 | Optical diffraction grating element | Takahiro Miyake, Yoshio Yoshida | 1994-02-01 |
| 5283772 | Optical head | Takahiro Miyake, Yoshio Yoshida, Hideaki Sato | 1994-02-01 |
| 5279924 | Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves | Keiji Sakai, Katsuhiro Kubo, Takahiro Miyake, Yoshio Yoshida | 1994-01-18 |