Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5679430 | Optical recording medium | Masahiro Shinkai, Sumiko Kitagawa, Kenryo Namba | 1997-10-21 |
| 5604004 | Optical recording medium using formazan metal complex dye and photo-stabilizing method | Masahiro Shinkai, Kenryo Namba | 1997-02-18 |