Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663114 | Catalyst for production of pyromellitic anhydride and method for production of pyromellitic anhydride | Tsukasa Takahashi, Masaaki Okuno, Yasuhisa Emoto, Yasushi Kiyooka, Kenji Ueda | 1997-09-02 |