Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6989404 | Method of recovering polyvinyl chloride and apparatus therefor | Koji Yamamoto | 2006-01-24 |
| 6894202 | Method for producing 2,6-dimethylnaphthalene | Koji Yamamoto, Seiichi Yamamoto, Masahiro Motoyuki, Shingo Yoshida | 2005-05-17 |
| 6756509 | Method for purifying crude 2,6-naphthalenedicarboxylic acid | Yoshiyuki Nagase, Koji Yamamoto, Maki Hamaguchi | 2004-06-29 |