Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6507547 | Medium and method for recording optical information | Yoshikazu Takagishi, Takanori Yoshizawa, Kazuyuki Shibuya | 2003-01-14 |
| 6504815 | Optical information medium, stamper for manufacturing transparent substrate therefor and recording method therefor | Toru Fujii | 2003-01-07 |