Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4627878 | Method of producing porous magnesia clinker | Hiroshi Hagiwara, Tsunenori Moriyama | 1986-12-09 |
| 4540553 | Desulfurizing agent | Hiroshi Hagiwara, Hajime Nagayama | 1985-09-10 |