Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5687152 | Optical pickup system | Tadashi Takeda | 1997-11-11 |
| 5648950 | Hologram integrated with a beam splitter to separate a plurality of polarized reflected light beams | Tadashi Takeda | 1997-07-15 |