Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867852 | Electrolytic method for after-treatment of carbon fiber | Nobuyuki Yamamoto, Katumi Anai | 1989-09-19 |
| 4839006 | Surface treatment process for carbon fibers | Hirofumi Uno | 1989-06-13 |
| 4814157 | Carbon fibers and method for producing same | Hirofumi Uno, Hajime Asai | 1989-03-21 |