Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6790509 | Substrate for information recording medium, information recording medium, and method for controlling surface of substrate for information recording medium | Tomotaka Yokoyama, Hiroshi Tomiyasu, Kouji Takahashi | 2004-09-14 |