Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650237 | Magnetic recording medium having a metallic magnetic layer and an aluminum alloy underlayer | Tsutomu Isobe | 1997-07-22 |
| 5608502 | Method for treating magnet roll by blasting with nonmagnetic spherical particles | Keitaro Yamashita | 1997-03-04 |