Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5171468 | Aromatic polyisocyanate | Kiyoshi Shikai, Kouzou Hayashi, Katsuyoshi Sasagawa, Akihiro Yamaguchi | 1992-12-15 |
| 4937339 | Process for preparing isocyanurate ring-containing materials | Tetsunosuke Shiomura, Yoshiho Sonobe, Akihiro Yamaguchi | 1990-06-26 |