Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6406771 | Optical recording medium and optical recording apparatus | Takeshi Arai, Toshihisa Nonaka | 2002-06-18 |
| 6352753 | Optical recording medium | Toshihisa Nonaka, Kunihisa Nagino, Takeshi Arai | 2002-03-05 |