Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855175 | Magnetic recording medium and production thereof | Kunio Wakai, Hideaki Niimi | 1989-08-08 |
| 4826739 | Magnetic recording medium | Tetsuo Mizumura, Kunio Wakai | 1989-05-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855175 | Magnetic recording medium and production thereof | Kunio Wakai, Hideaki Niimi | 1989-08-08 |
| 4826739 | Magnetic recording medium | Tetsuo Mizumura, Kunio Wakai | 1989-05-02 |