Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867852 | Electrolytic method for after-treatment of carbon fiber | Fujio Nakao, Katumi Anai | 1989-09-19 |
| 4861674 | Magnetic recording medium | Hiroo Inaba, Akira Ushimaru, Noburo Hibino, Kenzo Iwamoto | 1989-08-29 |