Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839458 | Preparation with controlled amounts of polycarbonate carbon tetrachloride | Akira Matsuno, Katsuyuki Sakata, Yoshiaki Ohtani, Isao Akihara | 1989-06-13 |
| 4810753 | Process for producing polyamide | Masaaki Miyamoto, Hidemi Nakanishi | 1989-03-07 |