Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6569530 | Magnetic recording medium and magnetic composite particles or magnetic recording medium | Kazuyuki Hayashi, Keisuke Iwasaki, Hiroko Morii | 2003-05-27 |
| 6531211 | Black plate-shaped ferrite composite particles with magnet oplumbite structure and magnetic recording medium using the same | Kazuyuki Hayashi, Hiroko Morii, Yasuyuki Tanaka, Keisuke Iwasaki | 2003-03-11 |
| 6511733 | Magnetic recording medium containing specific non-magnetic composite particles of coated hematite particles | Kazuyuki Hayashi, Hiroko Morii | 2003-01-28 |