Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6438097 | Optical recording disc capable of preventing illegal copy | Seiji Kajiyama, Youichi Tsuchiya, Kenji Torazawa | 2002-08-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6438097 | Optical recording disc capable of preventing illegal copy | Seiji Kajiyama, Youichi Tsuchiya, Kenji Torazawa | 2002-08-20 |