Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5721308 | Pitch based carbon fiber and process for producing the same | Iwao Yamamoto, Akira Nakagoshi, Akihiko Yoshiya | 1998-02-24 |
| 5643546 | Pitch-type carbon fibers and process for their production | Iwao Yamamoto, Hiroyuki Aikyo, Akihiko Yoshiya | 1997-07-01 |
| 5601794 | Pitch type carbon fibers and process for their production | Iwao Yamamoto, Hiroyuki Aikyo, Akihiko Yoshiya | 1997-02-11 |
| 5213677 | Spinning pitch for carbon fibers and process for its production | Iwao Yamamoto, Ryuichi Hara, Toshiyuki Tajiri, Akihiko Yoshiya | 1993-05-25 |