Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370917 | Magnetic recording disc comprising magnetic powder and a binder in a container which includes a nonwoven fabric liner comprising polypropylene and rayon fibers | Kazuhiro Niitsuma, Toshio Kawamata | 1994-12-06 |
| 5358777 | Magnetic recording medium comprising an underlayer of non magnetic powder and binder resin and a magnetic layer with a specified Young's modulus | Masaya Kojima, Toshio Kawamata | 1994-10-25 |
| 5300314 | Process for preparing a magnetic recording medium | Kazuhiro Niitsuma, Toshio Kawamata | 1994-04-05 |