Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869797 | Method for preparing a magnetic recording medium | Makoto Nagao, Kunihiko Sano, Akira Nahara | 1989-09-26 |
| 4867101 | Apparatus for producing magnetic recording medium | Makoto Nagao, Akira Nahara | 1989-09-19 |
| 4868070 | Vertical magnetization type recording medium and manufacturing method therefor | Makoto Nagao, Akira Nahara | 1989-09-19 |
| 4865878 | Method of manufacturing vertical magnetization type recording medium | Makoto Nagao, Akira Nahara | 1989-09-12 |