Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858049 | Magnetic film and magnetic head using the same | Toshio Kobayashi, Shigekazu Otomo, Ryoichi Nakatani | 1989-08-15 |
| 4847715 | Magnetic head having short distance between gaps for recording reproducing and erasing | Shigekazu Otomo, Takeo Yamashita, Noritoshi Saito | 1989-07-11 |
| 4814921 | Multilayered magnetic films and thin-film magnetic heads using the same as a pole | Yoshihiro Hamakawa, Kazuo Shiiki, Yoshihiro Shiroishi, Isamu Yuitoo, Hitoshi Numasaka +2 more | 1989-03-21 |
| 4803338 | Magnetic head having improved track width narrowing grooves | Shigekazu Otomo, Takeo Yamashita, Hideo Zama, Juichi Morikawa | 1989-02-07 |