Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882102 | Process for producing hard carbonaceous sheets | Takamasa Kawakubo, Mitsuru Yoshida | 1989-11-21 |
| 4882103 | Process for producing carbon product having coarse and dense structure | Takamasa Kawakubo, Mitsuru Yoshida | 1989-11-21 |