Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4500730 | Process for producing aromatic polycarboxylic acid | Toru Tanaka, Kazuo Tanaka, Yukio Sakai, Yasufumi Hamada | 1985-02-19 |
| 4490554 | Process for crystallizing trimellitic acid | Toru Tanaka, Kazuo Tanaka | 1984-12-25 |