Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885208 | Magnetic recording medium | Kiyomi Ejiri, Takao Ohya | 1989-12-05 |
| 4851289 | Magnetic recording medium | Hiroshi Ogawa, Shinji Saito, Toshihiko Miura, Nobuo Yamazaki | 1989-07-25 |
| 4806417 | Magnetic recording medium | Shinji Saito, Kiyomi Ejiri, Hiroshi Ogawa, Chiaki Mizuno | 1989-02-21 |
| 4803131 | Magnetic recording medium | Shinji Saito, Kiyomi Ejiri, Hiroshi Ogawa, Chiaki Mizuno | 1989-02-07 |
| 4801505 | Magnetic recording medium | Kiyomi Ejiri, Akihiro Matsufuji, Akira Kasuga | 1989-01-31 |