Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5643547 | Process for producing carbon fibers | Tetsuo Yamada | 1997-07-01 |
| 5605618 | Process for preparing nitrogen-containing isotropic pitch and nitrogen-containing isotropic pitch | Takashi Maeda | 1997-02-25 |