Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4811148 | Alloy magnetic recording head | Masaki Aoki, Masayuki Sakai, Hideo Torii, Hideyuki Okinaka | 1989-03-07 |
| 4803133 | Magnetic recording medium | Yukihiro Shimasaki, Hideaki Komoda, Ikuo Ota | 1989-02-07 |