Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38611 | Method for substituting defective recording of discoid recording medium and discoid recording medium recording and reproducing device | Yuji Takagi, Takahiro Nagai, Yoshihisa Fukushima, Shunji Ohara | 2004-10-05 |
| 6728195 | Multi-layered optical disk with shifted track and layer identification and method of detecting a track | Yoshihisa Fukushima, Yuji Takagi, Yasushi Azumatani, Hiroshi Hamasaka | 2004-04-27 |
| 6683834 | Information recording method, information recording/reproducing apparatus, and information recording medium | Shunji Ohara, Takashi Ishida, Yoshikazu Goto | 2004-01-27 |