Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6153767 | Production process for pyromellitic dianhydride | Tsukasa Takahashi, Yasuhisa Emoto | 2000-11-28 |
| 5504218 | Method for production pyromellitic anhydride | Tsukasa Takahashi, Tatsuya Kawabata, Masaaki Okuno, Yasuhisa Emoto, Kenji Ueda | 1996-04-02 |