Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869797 | Method for preparing a magnetic recording medium | Kunihiko Sano, Fusao Yamanaka, Akira Nahara | 1989-09-26 |
| 4867101 | Apparatus for producing magnetic recording medium | Fusao Yamanaka, Akira Nahara | 1989-09-19 |
| 4868070 | Vertical magnetization type recording medium and manufacturing method therefor | Fusao Yamanaka, Akira Nahara | 1989-09-19 |
| 4865878 | Method of manufacturing vertical magnetization type recording medium | Fusao Yamanaka, Akira Nahara | 1989-09-12 |
| 4840843 | Magnetic recording medium | Kunihiko Sano, Akira Nahara, Yasuo Nishikawa, Hiroyuki Iwasaki | 1989-06-20 |
| 4799244 | Surface acoustical wave charge transfer device having a plurality of stationary charge carrier storage portions | Nobuo Mikoshiba, Kazuo Tsubouchi | 1989-01-17 |