Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826737 | Method of using aluminum alloy as substrate for magnetic discs with enhanced magnetic recording density | Kazuo Yamada, Masahiro Tsuchiya, Hideaki Kakita, Reijiro Maruyama, Yo Takeuchi | 1989-05-02 |