Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5281802 | Focus error signal detection device with separating prism | — | 1994-01-25 |
| 5278817 | Optical pick-up for use with an opto-magnetic signal | Hideo Maeda, Shigeru Ohuchida | 1994-01-11 |