Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880694 | Magneto-optical recording material | Toshio Niihara, Katsuhiro Kaneko, Yutaka Sugita | 1989-11-14 |
| RE33022 | Ferromagnetic amorphous alloy | Yasuo Tsukuda, Kazuo Shiiki, Shigekazu Otomo, Mitsuhiro Kudo, Yasunobu Ogata +1 more | 1989-08-15 |
| 4838962 | Magneto-optical recording medium | Fumiyoshi Kirino, Yutaka Sugita | 1989-06-13 |