Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6723456 | Hematite particles aggregates, non-magnetic undercoatt layer for magnetic recording medium using the same, and magnetic recording medium having the non-magnetic undercoat layer | Kazuyuki Hayashi, Keisuke Iwasaki, Hiroko Morii | 2004-04-20 |
| 6689452 | Magnetic recording medium | Mamoru Kamigaki, Hiroko Morii | 2004-02-10 |