Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4842657 | Amorphous alloys containing iron group elements and zirconium and particles made of said alloys | Tsuyoshi Masumoto, Kiyoyuki Esashi | 1989-06-27 |
| 4828905 | Magnetic recording medium | Toshiaki Wada | 1989-05-09 |