Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6842420 | Optical disc having plural grooves of different depths | Shinya Abe, Shuji Sato | 2005-01-11 |
| 6700862 | Optical disc and manufacturing method for the same | Shinya Abe, Shuji Sato | 2004-03-02 |