Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189209 | Process for producing highly pure isophthalic acid | Tazuo Ohta, Kazuo Tanaka, Fumio Ohgoshi, Terumasa Yoshida | 1993-02-23 |
| 5132450 | Process for producing high purity isophthalic acid | Kazuo Tanaka, Terumasa Yoshida, Fumio Okoshi, Tazuo Ohta, Toshiaki Abe | 1992-07-21 |