Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8419966 | Method of manufacturing hexagonal ferrite magnetic powder, magnetic recording medium and method of manufacturing the same | Toshio Tada, Nobuo Yamazaki | 2013-04-16 |
| 7674535 | Magnetic transfer master disk, its manufacturing method and magnetic transfer method | Kenji Ichikawa, Seiji Kasahara | 2010-03-09 |
| 7577079 | Master disk for magnetic transfer | Kenji Ichikawa | 2009-08-18 |
| 7022424 | Magnetic recording medium | — | 2006-04-04 |