Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6829201 | Magnetic information recording medium having regions magnetized in different directions, a method for recording and reproducing for the same, and a method of manufacturing the same | Masakazu Nishikawa, Yoshihisa Usami, Makoto Nagao | 2004-12-07 |
| 6740407 | Magnetic recording medium and magnetic recording mode using floppy disk | Kazutoshi Katayama | 2004-05-25 |
| 6678101 | Method of magnetically transferring information signal from master medium to slave medium | Masakazu Nishikawa, Masashi Aoki | 2004-01-13 |