Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5366542 | Polishing composition | Tsutomu Yamada, Kouichi Ootani, Hitoshi Morinaga | 1994-11-22 |
| 4956015 | Polishing composition | Kouichi Ootani, Tsutomu Yamada | 1990-09-11 |
| 4582662 | Process for producing a carbon fiber from pitch material | Shinichiro Koga, Shigeya Yamaguchi, Eisaku Kakikura | 1986-04-15 |