Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5920541 | Data disc having both data and data retrieval information stored thereon and method for retrieving data recorded on the data disc | Koji Takagi | 1999-07-06 |
| 5914930 | Information recording medium and information reproducing apparatus for use therewith | Tetsu Yanagisawa | 1999-06-22 |
| 5675783 | CD-ROM XA data disc featuring display position data recorded thereon | — | 1997-10-07 |