Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882102 | Process for producing hard carbonaceous sheets | Mitsuru Yoshida, Yoshihisa Suda | 1989-11-21 |
| 4882103 | Process for producing carbon product having coarse and dense structure | Mitsuru Yoshida, Yoshihisa Suda | 1989-11-21 |
| 4863649 | Process for producing carbon heat generator | Takao Koyama | 1989-09-05 |