Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687012 | Hologram in which a plurality of areas are set and holography system to which hologram is applied | Der-Kuan Kang | 1997-11-11 |
| 5644565 | Optical recording medium including a plurality of diffracted grating cells | Susumu Takahashi, Fujio Iwata | 1997-07-01 |
| 5625619 | Optical recording medium having a plurality of different diffraction grating cells | Susumu Takahashi, Fujio Iwata | 1997-04-29 |
| 5617248 | Diffraction grating array and display having a diffraction grating | Susumu Takahashi | 1997-04-01 |