Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6461711 | Optical information recording medium | Kazuaki Taga, Yoshihisa Usami | 2002-10-08 |
| 6341122 | Optical information recording medium | Yoshihisa Usami, Michihiro Shibata, Noboru Komori, Takashi Morohashi | 2002-01-22 |