Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5627806 | Optical head having beam splitting surface curved to present a substantially uniform angle | — | 1997-05-06 |
| 5621714 | Optical pick-up apparatus having hologram and beam splitter with birefringent member and polarizing film | Takeshi Yamazaki, Hiroyuki Imabayashi | 1997-04-15 |