Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881144 | Thin film magnetic head | Isamu Yuito, Kazuo Shiiki, Yoshihiro Hamakawa, Hisashi Takano | 1989-11-14 |
| 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 |