Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646163 | Method for producing high purity xylylenediamine | Kenichi Nakamura, Kazuhiko Amakawa | 2003-11-11 |
| 6509490 | Method of purifying isophthalonitrile | Susumu Otsuka, Fumisada Kosuge, Kazuhiko Amakawa | 2003-01-21 |