Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883712 | Carbon fiber cord for rubber reinforcement | Yasuo Kogo, Shuji Takahashi, Yasuo Suzuki | 1989-11-28 |
| 4861809 | Friction material | Kenji Shimazaki, Kenji Niijima | 1989-08-29 |
| 4830845 | Precursor for production of preoxidized fibers or carbon fibers | Tetsuro Shigei | 1989-05-16 |