Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888211 | Process for preparation of vertical magnetic recording medium | Tetsuo Oka, Kenji Hayashi, Takayoshi Akamatsu | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888211 | Process for preparation of vertical magnetic recording medium | Tetsuo Oka, Kenji Hayashi, Takayoshi Akamatsu | 1989-12-19 |