Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5303225 | Multi-layered optical disk with track and layer identification | Isao Satoh, Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani | 1994-04-12 |
| 5293566 | Information recording and reproducing apparatus | Isao Satoh, Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani | 1994-03-08 |