Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857402 | Magnetic recording medium | Hajime Miyazuka, Nobuo Tsuji | 1989-08-15 |
| 4847156 | Magnetic recording medium | Akihiro Matsufuji, Kenichi Masuyama, Yutaka Kakuishi | 1989-07-11 |
| 4840843 | Magnetic recording medium | Kunihiko Sano, Makoto Nagao, Akira Nahara, Hiroyuki Iwasaki | 1989-06-20 |
| 4830906 | Magnetic recording medium | Masakazu Yoneyama | 1989-05-16 |
| 4808202 | Adsorptive fiber sheet | Yasumasa Nakazima | 1989-02-28 |