Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6670055 | Magnetic recording medium and manufacturing method therefor | Hiroshi Tomiyasu, Junichi Horikawa, Teiichiro Umezawa, Kenji Ayama | 2003-12-30 |
| 6537648 | Substrate for an information recording medium, information recording medium using the substrate and method of producing the substrate | Kouji Takahashi, Takemi Miyamoto, Hiroshi Tomiyasu, Genshichi Hata | 2003-03-25 |