Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9792942 | Optical information medium having multiple layers with management information areas disposed at the same distance from center | Yoshihisa Takahashi, Motoshi Ito | 2017-10-17 |
| 9767844 | Information recording method and information recording apparatus including switching of recording layer in shortage of free space | Yoshikazu Yamamoto, Motoshi Ito | 2017-09-19 |