Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874668 | Magnetic powder and magnetic recording medium comprising the same | Seiichi Asada, Toshinobu Sueyoshi | 1989-10-17 |
| 4828925 | Magnetic disc | Hitoshi Nagatani, Tsugihiro Doi, Kunio Mizushima, Akito Sakemoto | 1989-05-09 |
| 4820565 | Magnetic recording medium | Masaya Funahashi, Teruhisa Miyata, Kenichi Inoue | 1989-04-11 |
| 4797321 | Magnetic recording medium | Masaya Funahashi, Teruhisa Miyata, Kenichi Inoue, Kohji Norimatsu | 1989-01-10 |