Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865924 | Magnetic recording medium | Shinji Saito, Toshio Ono, Hiroshi Ogawa | 1989-09-12 |
| 4806417 | Magnetic recording medium | Shinji Saito, Hiroaki Araki, Kiyomi Ejiri, Hiroshi Ogawa | 1989-02-21 |
| 4803120 | Magnetic tape having a leader tape | Hiroshi Ogawa, Yasuo Tamai | 1989-02-07 |
| 4803131 | Magnetic recording medium | Shinji Saito, Hiroaki Araki, Kiyomi Ejiri, Hiroshi Ogawa | 1989-02-07 |