Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4487893 | Process for producing carboxyl group-containing fluoropolymer | Masaaki Yamabe, Gen Kojima | 1984-12-11 |
| 4439217 | Permselective element for gas separation | Masaaki Yamabe | 1984-03-27 |