Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674953 | Method of preventing scale adhesion to surfaces of polymerization tank with phenol-aldehyde coating | Seiichi Masuko, Ichisaburo Nakamura, Keiichi Fukuda, Yasuyuki Hatakeyama, Akihiro Yamaguchi | 1997-10-07 |
| 5631377 | Polyimide intermediates | Mitsunori Matsuo, Tsutomu Ishida, Akio Karasawa, Akihiro Yamaguchi | 1997-05-20 |