Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833173 | Floppy disk including a seed layer and a primer layer with specified relative properties | Masakazu Nishikawa | 2004-12-21 |
| 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, Kazuyuki Usuki, Yoshihisa Usami | 2004-12-07 |
| 6794062 | Magnetic transfer master medium | Hisashi Tsubata | 2004-09-21 |
| 6759183 | Master medium for magnetic transfer including metal disk with relief or recess pattern | Seiichi Watanabe, Masakazu Nishikawa | 2004-07-06 |
| 6735026 | Method of magnetically transferring information signal from master medium to slave medium | Masakazu Nishikawa | 2004-05-11 |
| 6731440 | Method and apparatus for magnetic transfer | Kazunori Komatsu, Masakazu Nishikawa | 2004-05-04 |